Cherry: Earwigs
Photo by: M. Bush
Biology
Earwigs are reddish-brown insects about 3/4 inch or less in length. Both males and females have pincers at the rear end.
Earwigs are largely beneficial, feeding on many pests such as aphids, mites, and nematodes, as well as on algae, fungi, and decaying plant material.
However, earwigs can also damage plants. They sometimes feed on flowers, shoot tips, leaves, or fruit. Damaged shoot tips may fail to develop properly, sometimes stunting growth. Damaged leaves exhibit small to large holes. Fruit damage typically consists of shallow, irregular areas chewed into the surface.
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!
- Rolled newspapers or flat boards placed beneath trees can serve both as monitoring devices and as traps for earwigs, which prefer narrow, enclosed hiding places.
- Remove tree wraps, which may provide shelter for earwigs.
- Cultivate the soil in early spring to disturb nests and expose eggs to predators.
- Apply Tanglefoot or other sticky material to plastic wrapped tightly on the trunk to prevent the earwigs from crawling up.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Apply around the bases of trees and on trunks as well as under vegetation and on trash if they are present.
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.