What is the primary function of insecticides?

The primary function of insecticides is to kill insects. These chemical agents are specifically formulated to target the biological processes of insects, disrupting their life cycles, behavior, or physiological functions. Insecticides can act in various ways, including contact poisoning, ingestion, or through inhalation. Understanding the specific mode of action is crucial for applying insecticides effectively to manage pest populations while minimizing harm to non-target organisms, including beneficial insects and the environment.

The other options refer to substances that would act on different types of organisms, such as birds, rodents, and plants, which are not the intended targets for insecticides. By focusing on insects, insecticides serve a particular role in pest control and play an essential part in agriculture, public health, and structural pest management.