The Australian Cotton Industry has been actively practising insecticide resistance management for 25 years, with the introduction of the Insecticide Resistance Management Strategy (IRMS) in 1983. Initial focus was on Helicoverpa armigera, and managed resistance primarily to the pyrethroids and endosulfan. The IRMS has since evolved to include aphids, mites, and whiteflies with guidance provided also for mirids. There are now more than 18 chemical groups managed for these 5 cotton pests.