What is an insect growth regulator?

An insect growth regulator (IGR) is a type of pesticide specifically designed to interfere with the normal development and growth processes of insects. These compounds mimic hormones or other substances that regulate the growth and metamorphosis of insects, effectively preventing them from reaching maturity or reproducing. By disrupting critical phases such as molting or maturation, IGRs help control pest populations without the need to kill adult insects immediately.

This targeted action allows IGRs to be effective in managing pest populations over time while minimizing effects on beneficial insects and the broader ecosystem. They are particularly useful in integrated pest management strategies, where maintaining beneficial insects is crucial for ecological balance.

In contrast, other options present different characteristics that do not accurately define IGRs. For example, pesticides that target adult insects specifically focus on killing those life stages, while biopesticides made from natural extracts might not function like IGRs at all. Finally, the concept of enhancing pest growth does not align with the purpose of IGRs, which aim to suppress pest development instead.