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What is an Insect Growth Regulator (IGR) primarily used for?

  1. To increase reproductive rates

  2. To prevent maturation from larvae to adult

  3. To enhance feeding behavior

  4. To increase pest populations

The correct answer is: To prevent maturation from larvae to adult

An Insect Growth Regulator (IGR) is primarily designed to interfere with the development of insects, specifically targeting their life stages such as the transition from larvae to adults. IGRs mimic natural hormones that regulate growth and development in insects, which disrupts their normal maturation process. This disruption effectively limits the ability of larvae to develop into adults, thereby controlling pest populations over time without an immediate lethal effect on existing adult insects. This method of control is particularly beneficial as it helps to reduce the overall reproductive capacity of the pest population by preventing the emergence of new adults that can breed. Consequently, using IGRs contributes to long-term pest management strategies by targeting the life cycle of the insects rather than just addressing their current population.