The Maryland Department of Agriculture is seeking help from the public in tracking down infected plant material. They are interested in any plants on the host list published by the USDA, APHIS that were planted beginning in 2003 and are exhibiting unusual symptoms should be sent to the Maryland Department of Agriculture (MDA) for testing.
If you suspect that you have an infected plant, whether it has symptoms or not, please call our phone consultants at 1-800-342-2507 (410-342-2507 in Washington, D.C.) before sending in a sample. They will assist in determining if a sample needs to be sent to MDA. We will take your name and address which will be forwarded to MDA daily. If you prefer, you can send us your name and mailing address with a message requesting a postage paid sample kit via the “Send a Question” link on this site. MDA will send you a postage paid sample kit.
Keep an eye out for bagworms on needled evergreen trees and shrubs. Pick off and dispose of bags through fall and winter.
Powdery mildew are noticeable are very noticable on shade trees. It is not necessary to spray most shade trees. For dogwood, please read our fact sheet, IPM Series: Dogwood under the publications link, online publications, ornamentals.
Large, colorful caterpillars may be seen occasionally crossing the road or wandering around the landscape. They are hickory horned devils, Imperial moth caterpillars, and caterpillars of the giant silk moths. They are looking for a sheltered place to pupate and spend the winter.