Some microscopic differences occur in other stages of development.
The developmental stages of both insects include egg, larva, pupa, and adult. The small white egg is laid by the adult moth and is about the size of a pin head. Eggs are usually found on plant terminals, stems or top of leaves, but may be deposited any place on the cotton plant. Several dark stripes occur on top of the body. Five pair of prolegs occurs at the rear of the body.