True or False: Insect growth regulators specifically affect insects only, making them safe for other animals.

Insect growth regulators (IGRs) are designed to target the hormonal processes in insects, which are crucial for their growth and development. These compounds mimic natural hormones that regulate development, causing disruptions in processes such as molting and reproduction. Because their mechanisms specifically align with the physiology of insects, IGRs are considered to be safer for non-target organisms, including mammals, birds, and beneficial insects.

The reason “true” is the correct answer is that these regulators are formulated to selectively disrupt insect growth without affecting other animals. This selectivity is what makes IGRs advantageous in integrated pest management, allowing for pest control without the broader ecological risks associated with more general pesticides.

While there may be some exceptions or specific contexts (such as IGRs that can affect certain aquatic organisms), the overarching principle is that IGRs are primarily effective against insect pests and are intentionally designed to minimize harm to beneficial species and mammals.