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- Plant Diseases
Anthracnose
Apple ScabBacterial Canker
Bacterial Leaf Spot
Blossom End Rot
Brown Rot
Cedar Apple Rust
Club Root
Common Rust
Corn Smut
Crown Gall
Damping OffDowny Mildew
Early Blight
Fire Blight
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Powdery Mildew
Verticillium Wilt
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nt Diseases | Planet Natural http://www.planetnatural.com/pest-problem-solver/plant-disease/
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Disease fungi take their energy from the plants on which they live. They are responsible for a great deal of
damage and are characterized by wilting, scabs, moldy coatings, rusts, blotches and rotted tissue. This
page is designed to help identify some of the more common plant diseases and provides earth-friendly
solutions (see organic fungicides) for combatting them. Click on the links or pictures below to learn more.
Anthracnose
Generally found in the eastern part of the U.S., anthracnose infected plants develop dark lesions on stems,
leaves or fruit.
view all
Apple Scab
Symptoms on fruit are similar to those found on leaves. Scabby spots are sunken and may have velvety
spores in the center.
view all
Bacterial Canker
Infection causes sunken, oozing cankers to form on many stone fruits. May cause wilting or death of
branches or trees.
view all
nt Diseases | Planet Natural http://www.planetnatural.com/pest-problem-solver/plant-disease/
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Bacterial Leaf Spot
Infected plants have brown or black water-soaked spots on the foliage, sometimes with a yellow halo,
usually uniform in size.
view all
Blossom End Rot
A serious disorder of tomato, pepper and eggplant, blossom end rot is caused by low levels of calcium
when fruits are forming.
view all
Brown Rot
A major disease of stone fruits, brown rot can cause huge losses in peaches, cherries, plums, prunes,nectarines and apricots.
view all
Cedar Apple Rust
nt Diseases | Planet Natural http://www.planetnatural.com/pest-problem-solver/plant-disease/
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On apple and crabapple, look for pale yellow pinhead sized spots on the upper surface of the leaves
shortly after bloom.
view all
Club Root
Infected plants in the cabbage family will have misshapen and deformed (clubbed) roots, often cracking
and rotting.
view all
Common Rust
Most often found on mature plants where symptoms appear primarily on the surfaces of lower leaves.
view all
Corn Smut
Corn galls can grow up to 5 inches in diameter and release thousands of spores as they burst or rupture.
view all
nt Diseases | Planet Natural http://www.planetnatural.com/pest-problem-solver/plant-disease/
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Crown Gall
A common disease of many woody shrubs and some herbaceous plants, including grapes, stone fruits and
roses.
view all
Damping Off
A result of soil borne fungi, damping-off usually refers to the disintegration of stems and roots at and
below the soil line.
view all
Downy Mildew
Spore production is favored by temperatures cooler than 65 degrees F. and by relative humidities
approaching 100%.
view all
Early Blight
Appears on lower, older leaves as small brown spots with concentric rings that form a bulls eye pattern.
view all
nt Diseases | Planet Natural http://www.planetnatural.com/pest-problem-solver/plant-disease/
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view all
Leaf Curl
Disease fungi overwinter as spores (conidia) underneath bark, around buds and in other protected garden
areas.
view all
Mosaic Virus
Leaves of infected plants are characterized by intermingled patches of normal and light green or yellowish
colors.
view all
Potato Scab
A common tuber disease that occurs wherever potatoes are grown. Scab spots appear as brown,
roughened areas.
view all
nt Diseases | Planet Natural http://www.planetnatural.com/pest-problem-solver/plant-disease/
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Powdery Mildew
Powdery mildew appears as a dusty white to gray coating over leaf surfaces and other infected plant parts.
view all
Verticillium Wilt
A persistent soil borne disease affecting fruits and vegetables, especially tomatoes, potatoes, peppers and
eggplant.
view all
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