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Coronavirus COVID-19

COVID-19 Advisory: WSU Extension is working to keep our communities safe. All Extension programming is being provided virtually, postponed, or canceled. Effective March 16, 2020, WSU Extension county offices and WSU Research & Extension Centers will be closed to the public. We are available via email, phone, and webconference.

Plant Pests & Diseases

Program Contact: Loren Imes
(360) 639-6059 •

swd_thumbAlthough Island County enjoys a mild Mediterranean-type climate, the cool rainy season does influence the type of plant pests and diseases we have. For example, we have a very vigorous snail and slug population! Other common pests are deer, rabbits, raccoons, squirrels, birds, moles and voles. Tent caterpillars also appear cyclically. All types of plants – vegetables, ornamentals, and conifers – can be infested with aphids or spider mites. Fungi such as black spot, rusts and powdery mildew affect many species. Fruit trees can be infected with apple scab and pear scab. Stone fruits are subject to peach leaf curl and brown rot.


For more information about plant disease diagnosis, pesticide application, or weed identification and control please see the following links: