What is the name of the pesticide that controls mosquitoes by working as an insect growth regulator?

The pesticide that controls mosquitoes through the mechanism of an insect growth regulator is Methoprene. This type of pesticide works by interfering with the normal growth and development of insects. Specifically, Methoprene mimics the action of juvenile hormone, which is essential in regulating the life cycle of mosquitoes. By disrupting these hormonal processes, Methoprene prevents larvae from maturing into adults, effectively reducing the mosquito population.

The other substances listed serve different functions: Chlorpyrifos is a broad-spectrum insecticide that disrupts the nervous system of insects; Malathion is an organophosphate that acts as a neurotoxin; and Permethrin is a synthetic pyrethroid that targets the nervous system as well as providing immediate knockdown of insects. While these pesticides are effective in controlling adult mosquito populations or other pests, they do not function primarily as insect growth regulators like Methoprene does.