White Mold
White mold is a serious and often lethal fungal disease that affects a wide variety of plants. Learn about symptoms and management in this factsheet.
Diseases & Disorders
Crown Gall
Crown gall is the most widely distributed bacterial disease of plants in the world. This factsheet describes what crown gall looks like and how to avoid problems with this disease.
Tobacco Rattle
Tobacco rattle is a common and potentially serious viral disease that affects a variety of herbaceous ornamentals as well as vegetables. Learn about symptoms and management in this factsheet.
Downy Mildew
The downy mildews are a group of fungal diseases that cause destruction of the leaves, stems, flowers and fruits of many plants, including grapes, cucumbers and roses. Learn symptoms and controls in this factsheet.
Impatiens Necrotic Spot
Ann Joy and Brian Hudelson, UW-Madison Plant Pathology Revised: 5/11/2010 Item number: XHT1139 What is impatiens necrotic spot? Impatiens necrotic spot is a viral disease that causes considerable losses to greenhouse-grown ornamentals and, to a lesser extent, vegetable crops. In Southern states, impatiens necrotic spot can also be a problem on field crops. Ornamental crops […]
Black Walnut Toxicity
Black walnut trees produce a toxic substance (called juglone) that prevents many plants from growing under or near them. Learn more about this compound and how to work around it in this factsheet.
Aster Yellows
Aster Yellows is a chronic, systemic disease that affects flowers in the aster family as well as some vegetables. Symptoms vary, and include unusual growth and colors. Learn more in this factsheet.
Damping Off
Damping off is a common and fatal disease of all types of plant seedlings, infecting them near the soil line causing them to collapse quickly. Learn how to avoid damping off here.
