An insect growth regulator (IGR) is a substance (chemical) that inhibits the life cycle of an insect. IGRs are typically used to control populations of harmful pests, such as cockroaches or fleas. ==Advantages== Many IGRs are labeled `reduced risk` by the Environmental Protection Agency, meaning that they target juvenile harmful insect populatio.....
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Chemical substance which disrupts the action of insect hormones that control moulting, development from pupa to adult and other processes (Watson, Moore & Ware, 1976).
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