Last year, earwigs devoured our bean plants...

Combine equal parts soy sauce and olive oil, put it in a small plastic container, and secure the lid. (A cottage cheese container works well.) Punch holes in the top of the container, near the lid. Make the holes large enough for the earwigs to get in. Bury the container in the soil just up to the holes. The soy sauce will attract the earwigs, and the oil will prevent them from escaping. Change the mixture as needed.