Asparagus: Asparagus beetle
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Biology
Two species of beetles feed on asparagus. Both are about 1⁄4″ long.
The asparagus beetle is blue-black, with yellow and red markings. The overwintering adult beetles feed on emerging spears in the spring, sometimes causing distortion of the spears. The females lay dark brown eggs on the foliage. The larvae are dark gray or greenish, with dark heads. They are up to 1⁄2″ long and feed on the foliage.
The spotted asparagus beetle is orange to reddish with black spots on the back. The adults feed on foliage, where the females lay greenish eggs. The larvae are orange and feed inside the berries.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Pick off eggs, adults and larvae when noticed.
- Pick off beetles. They can be destroyed or placed in the garbage.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Follow the product label instructions for minimum timing from last application to harvest.
Approved Pesticides
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.