Plant Diseases _ Planet Natural

8/12/2019 Plant Diseases _ Planet Natural

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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

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Plant Diseases

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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.

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Apple Scab

Symptoms on fruit are similar to those found on leaves. Scabby spots are sunken and may have velvety

spores in the center.

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Bacterial Canker

Infection causes sunken, oozing cankers to form on many stone fruits. May cause wilting or death of

branches or trees.

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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.

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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.

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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


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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.

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Club Root

Infected plants in the cabbage family will have misshapen and deformed (clubbed) roots, often cracking

and rotting.

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Common Rust

Most often found on mature plants where symptoms appear primarily on the surfaces of lower leaves.

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Corn Smut

Corn galls can grow up to 5 inches in diameter and release thousands of spores as they burst or rupture.

view all


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Crown Gall

A common disease of many woody shrubs and some herbaceous plants, including grapes, stone fruits and

roses.

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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.

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Downy Mildew

Spore production is favored by temperatures cooler than 65 degrees F. and by relative humidities

approaching 100%.

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Early Blight

Appears on lower, older leaves as small brown spots with concentric rings that form a bulls eye pattern.

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view all

Leaf Curl

Disease fungi overwinter as spores (conidia) underneath bark, around buds and in other protected garden

areas.

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Mosaic Virus

Leaves of infected plants are characterized by intermingled patches of normal and light green or yellowish

colors.

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Potato Scab

A common tuber disease that occurs wherever potatoes are grown. Scab spots appear as brown,

roughened areas.

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Powdery Mildew

Powdery mildew appears as a dusty white to gray coating over leaf surfaces and other infected plant parts.

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Verticillium Wilt

A persistent soil borne disease affecting fruits and vegetables, especially tomatoes, potatoes, peppers and

eggplant.

view all

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