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Openlands TreeKeepers Training
Tree Pests and Diseases
Global Impacts
Scott Schirmer IDA
3
Tree species distribution ndash Chicago region
European buckthorn
282
Green ash55
Boxelder55
Black cherry49
American elm34
Sugar maple28
White ash26
Amur honeysuckle
21
Silver maple20
Northern red oak20
other species410
NOWAK DJ RE HOEHN III AR BODINE DE CRANE JF DWYER V BONNEWELL AND G WATSON 2013b Urban trees and forests of the Chicago region USDA For Serv Resour Bull NRS-84 Northern Research Station
Newtown Square PA 106 p
Prevention
Triangle of Death
What does a sick tree look like
Damaged leaves
Crown or branch dieback
Early fruit drop
Epicormic shoots
Woodpecker holes and
scratching
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Global Impacts
Scott Schirmer IDA
3
Tree species distribution ndash Chicago region
European buckthorn
282
Green ash55
Boxelder55
Black cherry49
American elm34
Sugar maple28
White ash26
Amur honeysuckle
21
Silver maple20
Northern red oak20
other species410
NOWAK DJ RE HOEHN III AR BODINE DE CRANE JF DWYER V BONNEWELL AND G WATSON 2013b Urban trees and forests of the Chicago region USDA For Serv Resour Bull NRS-84 Northern Research Station
Newtown Square PA 106 p
Prevention
Triangle of Death
What does a sick tree look like
Damaged leaves
Crown or branch dieback
Early fruit drop
Epicormic shoots
Woodpecker holes and
scratching
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
3
Tree species distribution ndash Chicago region
European buckthorn
282
Green ash55
Boxelder55
Black cherry49
American elm34
Sugar maple28
White ash26
Amur honeysuckle
21
Silver maple20
Northern red oak20
other species410
NOWAK DJ RE HOEHN III AR BODINE DE CRANE JF DWYER V BONNEWELL AND G WATSON 2013b Urban trees and forests of the Chicago region USDA For Serv Resour Bull NRS-84 Northern Research Station
Newtown Square PA 106 p
Prevention
Triangle of Death
What does a sick tree look like
Damaged leaves
Crown or branch dieback
Early fruit drop
Epicormic shoots
Woodpecker holes and
scratching
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Prevention
Triangle of Death
What does a sick tree look like
Damaged leaves
Crown or branch dieback
Early fruit drop
Epicormic shoots
Woodpecker holes and
scratching
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Triangle of Death
What does a sick tree look like
Damaged leaves
Crown or branch dieback
Early fruit drop
Epicormic shoots
Woodpecker holes and
scratching
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
What does a sick tree look like
Damaged leaves
Crown or branch dieback
Early fruit drop
Epicormic shoots
Woodpecker holes and
scratching
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Types of Tree Problems
InsectAnimalSucking chewing boring
DiseaseFungi bacteria viruses
EnvironmentalCulturalTemperature drought flooding deep planting
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Emerald Ash Borer
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
How Does EAB Kill Trees
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Asian Longhorned Beetle
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Asian Longhorned Beetle (ALB) has the potential to cause more damage to trees than Gypsy Moth Dutch Elm Disease and Chestnut Blight combined
Preferred HostbullMaple (Acer spp)bullElm (Ulmus)bullWillow (Salix)bullHorsechestnut (Aesculus)bullBuckeye (Aesculus)
Whatrsquos at stake
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
ALB Damage to Trees
bull Larvae feed on living tissue under the bark before boring into heartwood where they eventually pupate
bull Larval feeding damages the treersquos circulation disrupts flow of water and nutrients
Larval tunnel
damage and
exit hole from
adult ALB
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Pennsylvania Department of Conservation and Natural Resources - Forestry Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Thomas B Denholm New Jersey Department of Agriculture Bugwoodorg
Watch out forhellip
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
August is ldquoTree Checkrdquo Month
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
bull 250+ plant hosts
bull Prefers oaks
bull Immobile females
bull 140 years to infest NE US
bull Defoliate 4mil acresyear
USDA APHIS PPQ USDA APHIS PPQ Bugwoodorg
Name European Gypsy MothLymantria dispar
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Milan Zubrik Forest Research Institute - Slovakia Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Bill McNee Wisconsin Dept of Natural Resources Bugwoodorg
Watch out for
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Look alikes
Eastern Tent Caterpillar
Fall Webworm
Asian Gypsy Moth
Whitemarked Tussock
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Signs amp Symptoms
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Asian gypsy moth Lymantria dispar asiatica
20
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Spotted lanternfly
21
L Barringer (PA Dept of Ag)G Hoover (Penn State
U)
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Whatrsquos at stake
22
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Nymph Adult
Gypsy Moth
Spotted
Lanternfly
Biology
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
What to look for
24S Baskauf (Vanderbilt
U)
PA Dept of Ag
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Leaf (Foliar) Diseases
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Anthracnose (fungus)
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Anthrachnose
Anthracnose on red maple (Acer)
Leaf spots and blotches
on oak leaves
(Quercus) leaves
caused by anthracnose
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Anthracnose (fungus)
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Apple Scab (fungus)
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Apple Scab (fungus)
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Tar Spot Rhytisma spp
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Bur oak blight (fungus)
Photo Tom Harrington Iowa State Univ
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Bur oak blight
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Twig Stem amp Trunk
Diseases
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Cankers
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Fireblight (Bacteria)
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Black Knot (Fungus)
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Black Knot (Fungus)
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Cedar Hawthorn Rust - Fungus
bull On cedar reddish galls develop into telia horns
bull On hawthorn (apple quince) yellow spots on leaves twigs fruit
bull Two year cycle
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Fire Blight - Bacteria
bull Water soaked spots at wounds blossoms and leaves
bull Leaves turn black and shriveled (fire scorched)
bull Shepardrsquos crook
bull Die-back
bull Death
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Fire Blight - Control
bull Prune out diseased wood in winter
bull Avoid excessive fertilizer or pruning
bull Remove cankers
bull Plant resistant varieties
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Vascular Diseases
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Oak Wilt (Fungus)
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Oak Wilt (Fungus)
Photo credit U of I
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
This is oak anthracnose
NOT oak wilt
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Report Pests
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
Resources
Plant Clinic
plantclinicmortonarborg
httpwebextensionillinoiseduplantclinic
