Plant Pests & Diseases

Program Contact: Jeannine Polaski, Master Gardener Coordinator
(360) 427-9670 Ext. 688 • jeannine.polaski@wsu.edu

insectonplant(Custom)Mason County has many micro-climates and the cool rainy season influences 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 and fall webworms 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.

Visit or call the plant answer clinic at the Mason County Extension office with your fresh sample and talk with a Master Gardener on Mondays between noon and 3 pm. The phone number to call is (360) 427-9670 ext 687. Please view the WSU Puyallup plant clinic site for directions and forms before bringing your sample in for the Master Gardener diagnosis. This site will help you to know what information the Master Gardener will need to know to accurately identify your plant/insect problem.