A compound, either natural or synthetic, which influences insect growth and development (e.g., Dimilin affects boll weevil grub integument formation during shed, resulting in deformed pupae and adults or premature death.)

Chemical substance that disrupts the action of insect hormones that controls moulting, development from pupa to adult, and other processes (Watson, Moore & Ware, 1976).

a natural or man-made chemical used to disrupt the normal growth and development of an insect either by affecting the hormonal system or exoskeleton development.

a good choice here as well