Methoprene is referred to as an insect growth regulator because it interferes with the maturation stages through which an insect goes: from egg, larvae, and pupa, to adult.

Methoprene is a chemical that interferes with the development of insects, and some related arthropods. There are a number of similar chemicals that act this way and they are all called insect growth regulators (IGRs) because they stop normal insect growth and development. So, for example, if a larval flea (right) is exposed to methoprene it will not complete development to an adult flea and will eventually die. Manufacturers often refer to this as "breaking the flea's life cycle".

Growth regulators make it impossible for insects to mature to the adult stage of development.

Methoprene is considered a biochemical pesticide because rather than controlling target pests through direct toxicity, it interferes with the insects' life cycle and prevents them from reaching maturity or reproducing

Precor 2000 Plus Premise Spray Flea Control Code: precor-2000-plus-premise-flea-spray Price: $18.99	Precor IGR Concentrate Code: precor-igr-concentrate Price: $11.99	Tick Control Kit Bifen, Precor, Petcor Code: tick-control-kit-bifen-precor-petcor Price: $141.99
Precor Plus IGR Fogger Flea Control 6 oz Code: precor-plus-igr-fogger-flea-control-6-oz Price: $12.95	Precor 2000 Plus Premise Spray, Precor, Permethrin, Flea Control 1 Case Code: precor-2000-premise_spray-permethrin-flea-control Price: $144.99	Petcor Flea Spray Code: petcor-flea-spray Price: $17.95
Altosid Pro-G Mosquito Larvicide 2.5 lbs Code: altosid-pro-g-mosquito-larvicide Price: $42.55	Altosid 30-Day Briquets Mosquito Control Code: Altosid-30-Day-Briquets Price: $218.85	Altosid Pro-G Mosquito Larvacide Methoprene 1% 12 Jars/1 Case Code: altosid-pro-g-larvacide Price: $436.80
Extinguish Professional Fire Ant Bait Code: extinguish-professional-fire-ant-bait Price: $39.83	Extinguish Plus Fire Ant Bait Code: extinguish-plus-fire-ant-control Price: $24.85	Extinguish Plus Fire Ant Control 25 lb Code: extinguish-plus-fire-ant-bait Price: $203.99
Extinguish Fire Ant Bait 25lb Code: Extinguish-fire-ant-bait-control Price: $203.00	Extinguish Professional Fire Ant Bait 1 lb. Code: Extinguish-fire-ant-bait-1lb Price: $39.83

It is widely used for flea, mosquito and fly control either alone or in combination with another insecticide.

Methoprene is found in all Precor Products, Petcor pet Spray, Altosid for mosquito control, and Extinguish for Fire Ant Control.