Adults overwinter in plant debris. Barrel-shaped eggs are laid in clusters in the spring under plant leaves. Feeding occurs on soybeans, corn, alfalfa, lima beans, peaches, etc. They sometimes gather in large numbers under night-lights. Sometimes, they cluster in small groups of five or so, with as many as up to 100 on one house at a time.
Bugs can take flight readily and can make a buzzing noise if disturbed.
Some overwinter in the house and re-emerge on warm, sunny days during the winter and spring months. This feeding damage does not hurt the tree, but reduced seed production may result from heavy infestations. Usually a single generation occurs each year. Control Measures Use proper night-light discipline and special yellow lights, which are least attractive to these bugs. Be sure to caulk and seal any openings into dwellings, especially around windows and doors.