Dahlia: Western spotted cucumber beetle
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.
Use Integrated Pest Management (IPM) for successful plant problem management.
Select non-chemical management options as your first choice!
- Pick and kill individual beetles.
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.