However, within 24 hours, pupae become a deeper brown to reddish-brown. Just prior to moth emergence, pupae appear almost black in color. Pupae vary in size between 6 to 11 millimeters. Moths are 5 to 10 millimeters in length with a wingspread of 16 millimeters. Generalized Life History.
Indianmeal moths are sexually mature and capable of mating immediately after they emerge from pupae.
Female moths live up to 2 weeks and are capable of depositing up to 400 eggs each. Eggs are deposited singly or in clumps on or near potential food sources. Newly emerged larvae begin feeding immediately. There are 5 to 7 larval stages. Generations Per Yea r.