Current Pests and Problems

Thousand Cankers Disease of Walnut







This photo shows a declining
black walnut with thinning crown

Brown Marmorated Stink Bug (Halyomorpha halys):

Chrysanthemum White Rust
(Puccinia horiana P. Henn.):

Chrysanthemum white rust (CWR) was confirmed on plants in a homeowner landscape in Montgomery County, MD, December, 2010.

Downy Mildew on Cucumber
(Pseudoperonospora cubensis):

Downy mildew on cucumber was found in three counties in Maryland over the 4th of July
weekend, 2011.

Maintained by the IET Department of the College of Agriculture and Natural Resources. © 2017.