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| Western spotted cucumber beetle
Cucumber, Pumpkin, Squash
Disease
Angular leaf spot
Cucumber mosaic virus
Curly top (Beet curly top virus)
Damping-off
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Insect
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Squash bug
Western spotted cucumber beetle
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Caption: Western spotted cucumber beetle
Photo by: K. Grey
Cucumber, Pumpkin, Squash : Western spotted cucumber beetle
(revision date: 2/14/2019)
Use Integrated Pest Management (IPM) for successful plant problem management.
Biology
The western spotted cucumber beetle is a pest of many ornamentals and vegetables. About 1/4" long, the adult beetles have yellow wing covers with black spots. The rest of the body is black. Adults feed on leaves of plants, while the larvae feed on the roots of some plants.
Management Options
Non-Chemical Management
Pick and kill individual beetles.
Select non-chemical management options as your first choice!
Chemical Management
IMPORTANT:
Visit Home and Garden Fact Sheets for more information on using pesticides
Repeated applications are necessary most seasons. Apply when first observed on plant. Products containing esfenvalerate are toxic to bees. Do not apply any of the products listed on or near blooming plants. To minimize risk to bees, apply in the evening after bees have stopped foraging for the day.
Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.
Bug Buster-O [Organic]
Active ingredient: pyrethrins | EPA reg no: 1021-1771-54705
Monterey Bug Buster II
Active ingredient: esfenvalerate | EPA reg no: 1021-1778-54705
Safer Brand BioNEEM Multi-Purpose Insecticide & Repellent Conc [Organic]
Active ingredient: azadirachtin | EPA reg no: 70051-6-42697
This list may not include all products registered for this use.
Images
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Caption: Western spotted cucumber beetle
Photo by: K. Grey
Caption: Western spotted cucumber beetle
Photo by: A.L. Antonelli