What is the primary function of a rodenticide?

The primary function of a rodenticide is to control rodents. Rodenticides are specifically designed to manage rodent populations by causing harm or death to the animals that ingest them. They work through various active ingredients that either disrupt bodily functions, interfere with vital processes, or cause internal bleeding after consumption, effectively reducing or eliminating rodent numbers in an area.

While repelling rodents may be a goal in some pest management strategies, rodenticides do not fulfill this function; they are formulated to kill, not deter. Similarly, attracting rodents for trapping is not the purpose of rodenticides, as their aim is to eradicate existing populations rather than draw them in. Lastly, rodenticides are not intended for eliminating insects, as they are tailored specifically for addressing rodent issues. Thus, controlling rodents is the fundamental role of a rodenticide, making it the correct answer.