Green cloverworm larvae are light green with three pairs of white stripes running the length of the body. In addition to the three pairs of legs near the head, three pairs of fleshy 'prolegs' occur near the middle of the body, and one additional pair occurs on the last abdominal segment. Larvae thrash vigorously when disturbed. Smaller stages may drop from the leaf when disturbed and hang from a silken thread. Larvae chew irregularly shaped holes in the leaves from July through September.