In Virginia harlequin bugs overwinter as adults in plant debris. Adults become active in early spring and lay eggs on the undersides of leaves for a period of about two weeks. Eggs are characteristically placed in two rows of about a dozen eggs each. Each female lays about 150 eggs. In cooler temperatures the eggs hatch in about three weeks, but as temperatures rise eggs can hatch in less than a week.
Nymphs feed and mature through five instars in about six to eight weeks.
Multiple generations occur annually in Virginia. Eliminate weedy areas around garden in early spring. Treat with a registered insecticide. Follow all label instructions, precautions and pre-harvest intervals. Because pesticide labels can change rapidly, you should read the label directions carefully before buying and using any pesticides.