True or False: Insect growth regulators attack a growth process found only in insects, making them generally harmless to humans and other vertebrates.

The statement is true because insect growth regulators (IGRs) function by specifically targeting hormonal processes that are unique to insects. These compounds disrupt the normal development and growth in insects by interfering with their endocrine system, which manages processes such as molting and metamorphosis. Since these hormonal processes do not exist in humans or other vertebrates, IGRs are generally considered safe for them.

While it is important to note that potential effects can vary based on concentration and specific formulations, the key aspect that makes the statement accurate is that the modes of action of IGRs are specific to insects, thus leading to their relative safety in non-insect species. This specificity allows for effective pest management while minimizing risks to human health and other animals, further reinforcing the assertion presented in the statement.