Upload
hudson-bethany
View
217
Download
0
Tags:
Embed Size (px)
Citation preview
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Session’s Purpose?Session’s Purpose?
There are two goals to this session.There are two goals to this session.1.1.Evaluate your current practices.Evaluate your current practices.
2.2.Learn what changes you can easily make.Learn what changes you can easily make. This is a self assessment.This is a self assessment.
– The worksheet will not be collected.The worksheet will not be collected.– Be honest with your answers.Be honest with your answers.– Ask questions as we go along.Ask questions as we go along.
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Four areas of assessmentFour areas of assessment
General Crop ManagementGeneral Crop Management Weed ManagementWeed Management Insect ManagementInsect Management Disease ManagementDisease Management
?????? ??
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Assessment WorksheetAssessment Worksheet
Diagram of worksheet here. Diagram of worksheet here. Explanation of how to fill it out.Explanation of how to fill it out.
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect ManagementWhat is Your Insect Management
Philosophy– Complete Insect Control???
Control costs < damage
– Don’t control insects at all???Could suffer economic loss
– Same insecticide treatments each year??? Insect populations fluctuate
– Keep populations below economic thresholdsMost economically and environmentally sound
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Improper Identification– Can increase control costs– Can increase amount of insect damage– Can kill beneficial insects– Can lead to insecticide resistance
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Cooperative Pest Survey Cooperative Pest Survey BulletinBulletin
•Free from WI Dept. of Ag.
•Weekly assessment of insects and diseases
•Doesn’t take the place of scouting
•Does remind you to scout
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Scouting Records– Helps identify fields, which overtime, might
need preventive controls or special treatmentWirewormWhite grubStalk borerHop vine borer
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect ManagementWhy scout seedling corn for white grub,
wireworm and seed corn maggot if rescue treatments aren’t available?– Develop field histories for preventive control
measures– Identifies actual problem if you have reduced
plant stands
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Black cutworm scouting– Start scouting at emergence– Most susceptible fields
Corn after soybeansLow areas of fieldWeedy field
– Scout at weekly intervals until V4-V5
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
First Generation European corn borer– Use Pest Survey Bulletin to schedule first visit– Early planted fields most susceptible– Scout at weekly intervals until threat is over– Look for “shotholing” in new leaves– Pull whorl leaves & count larvae
(5% loss/larvae)
– Monitor Bt corn for resistance
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Second Generation European Corn Borer– Use Pest Survey Bulletin to schedule first visit– Late planted fields most susceptible– Scout at weekly intervals until threat is over– Count egg masses – Monitor Bt corn for resistance
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Using European corn borer scouting information to schedule harvests– Protect against harvest losses caused by
Stalk tunneling Stalk rots
– Use information from first and second generation
– Harvest heavily damaged fields first (if you have a choice)
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Scouting for corn rootworm beetles can predict next years damage potential– Scout during egg laying period (mid-August
to early-September)– 1-3 visits are necessary– Treat or rotate if you average > 0.75
beetles/plant
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Granular Insecticides for first year corn??In Wisconsin, Female corn rootworms lay
eggs in corn (some exceptions in IL, IN, MI)
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagmentInsect Managment
Using below labeled rates of Counter, Force and Lorsban to control rootworms under light to moderate populations– Up to 25% rate reduction for rootworms– Scientific data from North Central Region is
encouraging– Proper calibration is a must– No product “guarantee” from company
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
A benefit of weed control is improved insect management
Wireworm White Grub
Stalk borer Black cutworm
Armyworm Slugs
Hop vine borer Billbug
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Soil Insecticide Calibration– Calibration saves $ – Don’t use book values from operators manual
or insecticide label– Calibrate each row of the planter– Company reps will (want to) help
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Bt hybrid selection– Based on probability of damage on your farm
Scouting data from previous yearsFollow up loss estimates
– 5% loss/first generation larvae
– 4% loss/second generation larvae
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
Insect Resistance Management for European corn borer– Real concern – 20% Non-Bt Refuge, No hybrid restrictions – Refuge must be within 1/2 mile of Bt corn, 1/4 mile if you
want to maintain option to spray refuge – Refuge can be treated if economically justified. If refuge
areas are to be treated for corn borers, microbial Bt foliar sprays are not to be used.
– IRM plant for rootworm resistant hybrids will be different
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Disease ManagementDisease Management
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Disease ManagementDisease Management
Northern Corn Northern Corn Leaf BlightLeaf Blight
AnthracnoseAnthracnose
Yellow Leaf Yellow Leaf BlightBlight
Grey Leaf SpotGrey Leaf Spot
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Disease ManagementDisease Management
Northern Corn Northern Corn Leaf BlightLeaf Blight
AnthracnoseAnthracnose
Yellow Leaf Blight Yellow Leaf Blight
Grey Leaf SpotGrey Leaf Spot
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Where to get help for Where to get help for corn disease IDcorn disease ID
County Extension Agents UW Plant Disease Clinic & Web site
http://www.plantpath.wisc.edu/pddc/ Integrated crop and pest management website
http://ipcm.wisc.edu Cooperative Extension Publications
– A3646 Pest Management In WI Field Crops
– A7800603 Corn Disease I (Picture Sheet)
– A7800604 Corn Disease II (Picture Sheet)
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Disease ManagementDisease ManagementApril May June July Aug. Sept. Oct.
Seed Rots
Seedling Blights
Anthracnose Leaf Blight
Anthracnose Stalk Rot
Nematodes
Common Rust
Northern Corn Leaf Blight
Northern Corn Leaf Spot
Grey Leaf Spot
Goss’s Bacterial Wilt & Blight
Eye Spot
Fusarium & GibberellaEar Rot
Fusarium & Gibberella Stalk Rot
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Seed Treatment is Seed Treatment is more than colormore than color
Captan-Widely used borad spectrum contact fungicide, however, poor on pythium and very dusty.
Metalaxyl-Narrow spectrum systemic fungicide with excellent activity against Pythium
Fludioxonil-broad spectrum contact fungicide, very effective against Fusarium, but poor Pythium activity.
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Plant StressesPlant StressesAugust Leaf diseases Insect feeding Hail injury Low soil fertility Compaction Etc.
August/September High soil moisture
Increased Pythium Root Infection
Premature plant death-rotting stalks
-Lodged plants
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Time to total your score.Time to total your score.
Sum each category separately.Sum each category separately. Sum each category.Sum each category. Pass in your scores. DO NOT put your Pass in your scores. DO NOT put your
name on them.name on them.
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
SummarySummary
You should have a good idea where you You should have a good idea where you stand in the IPM continuum.stand in the IPM continuum.
You should have an idea of what options You should have an idea of what options you can use.you can use.
Remember to make small changes and Remember to make small changes and evaluate the time, labor and profit.evaluate the time, labor and profit.
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Where to Get More InformationWhere to Get More Information
http://ipcm.wisc.edu/http://ipcm.wisc.edu/ Wisconsin Crop ManagerWisconsin Crop Manager Wisconsin Pest Survey BulletinWisconsin Pest Survey Bulletin Your local Cooperative Extension officeYour local Cooperative Extension office Consulting services, other sourcesConsulting services, other sources
UW-Madison, IPCM ProgramsUW-Madison, IPCM Programs
Insect ManagementInsect Management
This program is an effort of the This program is an effort of the University of Wisconsin’s Integrated Pest and University of Wisconsin’s Integrated Pest and
Crop Management ProgramsCrop Management Programs with funding provided by the with funding provided by the
Pesticide Use and Risk Reduction Project.Pesticide Use and Risk Reduction Project.