Rose: Western spotted cucumber beetle
categories: Flowers Ornamentals Rose Rose Insects
revision date: 2023-02-08 12:00
Photo by: K. Grey
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
Use Integrated Pest Management (IPM) for successful plant problem management.
Non-chemical Management
Select non-chemical management options as your first choice!
- Pick and kill individual beetles.
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.
- Esfenvalerate is toxic to bees. Do not apply products containing esfenvalerate on or near blooming plants. To minimize risk to bees, apply in the evening after bees have stopped foraging for the day.
Approved Pesticides
Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.