What type of pesticide is specifically used to control insects?

The correct choice, insecticide, directly refers to a class of pesticides specifically formulated to target and control insect populations. Insecticides work by disrupting essential biological processes in insects, which can include neurotoxicity, growth regulation, or reproductive interference. This targeted action makes them effective for managing pests that can cause damage to crops, transmit diseases, or become nuisances.

Other pesticide types serve different roles. Herbicides are aimed at managing unwanted plants or weeds, while fungicides are designed to combat fungal diseases affecting plants. Rodenticides specifically target rodents, leaving insect pests unaddressed. Each of these classes has a distinct function, but in the context of controlling insects, insecticides are the relevant and appropriate choice.