Earwigs are primarily scavengers of dead insects and rotted plant materials but may also feed on live plants. They are a natural enemy of some mites and aphids. Earwigs can become a problem in the garden, feeding on the roots and leaves of flowers, vegetables and shrubs. Common targets include marigolds, dahlias, zinnias, roses, lettuce, and strawberries. They may also feed on corn tassels and blossoms, reducing kernel set.
Earwigs are most common in the summer and most active at night.
During the day they usually find shelter in dark, moist places beneath stones, boards, sidewalks, debris or in the soil. Since they multiply fairly quickly, an infestation can number in the thousands. When dry weather sends them in search of moisture, earwigs can become an indoor pest as well. Here they will seek shelter under rugs, cushions, and baseboards, and in dark, damp crevices, especially in basements. After entering houses, they feed on sweet, oily or greasy foods or houseplants.