Indian meal moth adults have a 5/8? to ¾” wing span. The wings are a copper brownish colour with a grey band near where the wings attach to the body.
The larvae are about ½” long and dirty white in colour. The head is a reddish-brown colour.
Adult females lay 100-400 eggs at night over a period of about 18 days. The larval development requires 13- 288 days. The average life cycle, egg to egg, requires 25- 135 days. There are usually 6 generations per year.