Damage is caused by the nymphs and adults sucking sap from the bean pods. This sucking reduces the quality of the beans. And if the beans are small when they are attacked, they do not develop. In severe cases complete loss of beans occurs. Most stinkbugs overwinter as adults in sheltered places, such as fence rows, ditch banks, and other places where plant remnants are abundant.
Adults begin laying eggs in early spring.
They usually build up on vegetables and dogwoods. A generation is produced every 5-6 weeks. They are not generally found on soybeans until the pods begin to form. But by mid-September they are usually present in damaging numbers and can damage beans up until harvest time.