Which type of pesticide is known as an Insect Growth Regulator (IGR)?

Nylar is classified as an Insect Growth Regulator (IGR) because it works by disrupting the normal development of insects. Specifically, IGRs mimic hormones that play a crucial role in the growth and metamorphosis of insects, leading to issues with their ability to mature, reproduce, or develop properly. This makes IGRs effective tools for controlling pest populations, as they target the insect's life cycle rather than killing them outright, providing a more prolonged control strategy.

The other options do not function as IGRs. Ficam is a broad-spectrum insecticide that kills insects through neurotoxic effects. Boric acid is a desiccant and stomach poison that affects insects once ingested and does not interfere with their growth regulation. Carbamate, while an effective insecticide, operates through different neurotoxic mechanisms and is recognized primarily for its capability to disrupt nervous system functioning in insects rather than growth regulation.