Authors: Derrick Grunwald and Renee Rioux, UW-Madison Plant PathologyLast Revised: 12/13/2021D-number: D0130 What is iris severe mosaic? Iris severe mosaic (also called yellow latent disease or gray disease) is a potentially severe viral disease that can adversely affect both bulb and rhizome-forming irises, as well as crocuses. German bearded irises are particularly susceptible to the disease. Commercially produced irises […]
By: Amanda Gevens, Professor and Integrated Extension Specialist Plants can be affected by fungus, bacteria, viruses and other factors. In this video, you will learn how to look for symptoms of plant disease, cultural methods to reduce disease pressure, and other management practices. Plant disease is an abnormal response in plant health to a pathogen, […]
This fact sheet provided a list of 10 relatively easy to identify plant diseases.
Gray mold (or Botrytis blight) is a common and often serious fungal disease that can affect plants of all kinds. Learn more in this factsheet.
Herbicide damage is any adverse, undesired effect on a plant that is caused by exposure of that plant to a pesticide designed for weed control. Learn symptoms and more in this factsheet.
Chlorosis is a common nutritional disorder of many woody ornamentals in Wisconsin, particularly in the southern and eastern parts of the state. This factsheet describes symptoms, causes and cures.
Learn to recognize and prevent plant damage caused by deicing salts. Learn about alternatives to rock salt and which plants are salt-tolerant.
Edema is a physiological disorder that affects houseplants, greenhouse plants, and other plants sheltered under plastic. Learn about these fluid-filled “blisters” on leaves in this factsheet.
Powdery Mildew is a disease that affects a lot of different plants. On most plants, it’s harmless. Find out if various home remedies you’ve heard about are effective in this video!
Root rot is a general term that describes any disease where the causal organism attacks and leads to the deterioration of a plant’s root system. Learn about root roots and their management in this factsheet.
Volutella blight is a common and potentially lethal disease of Japanese pachysandra. Learn about symptoms and management of Volutella blight in this factsheet.
Tobacco mosaic causing a blotchy light and dark coloring (mosaic) of tobacco leaves. Tobacco mosaic causing a blotchy light and dark coloring (mosaic) of tobacco leaves.