This beetle has been confused with flea beetles. However, the hind legs of the yellowmargined leaf beetle are not enlarged for jumping as in flea beetles. Adult beetles overwinter and mate soon after emerging from the pupa. Larvae hatch from eggs and develop through several stages before pupating. Development from egg to adult occurs over about 23 days.
Mouthparts are for chewing.
Leaves of mustard greens, turnip greens, collard greens, Chinese cabbage, bok choy, radish, Irish potato, watercress and roses are consumed by adults and larvae, giving them a tattered appearance with many irregularly shaped holes. Populations increase and damage is more severe in spring and fall. For additional information, contact your local Texas extension service agent, or search for other state extension service offices.