Authors: Brian Hudelson, UW Plant PathologyLast Revised: 12/16/2021D-number: D0114 What is Thyronectria canker? Thyronectria canker is a common fungal disease of honeylocust (Gleditsia triacanthos), occurring wherever this tree is grown. Black locust (Robinia pseudoacacia) and Kentucky coffeetree (Gymnocladus dioicus) have also been reported to be susceptible to the disease. Thyronectria canker is non-lethal and typically causes relatively minor […]
This fact sheet provided a list of 10 relatively easy to identify plant diseases.
Learn about tree decline and dieback symptoms and how to prevent and treat problems that occur in this publication
This factsheet will help with the identification of some common leaf diseases of deciduous trees.
Gymnosporangium rusts, such as Cedar Apple Rust, need both junipers and woody plants in the rose family to complete their life cycle. Learn more in this factsheet.
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.
This fact sheet explores sun scald, girdling roots, mower injury, previous defoliation, graft incompatibility, twine and tree wrap injury, and gas leaks as common causes of tree decline and death.
Tar spot is a common, visually distinctive and primarily cosmetic fungal leaf spot disease that can affect many species of maple, including silver maple, sugar maple and Norway maple. 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.
Armillaria root disease, a/k/a shoestring root rot, can affect most conifer and hardwood species, and is an often lethal disease of tree and shrub roots and lower stems. Learn more in this factsheet.
An indispensable resource for nursery growers, this publication identifies pests of trees and shrubs in the state plus the products available for their control.
Galls are abnormal growths on plants that can result from the feeding of living organisms such as bacteria, fungi, nematodes, insects and mites. Learn about common galls in this factsheet.
