Which pesticide is used to target insect larvae?

The choice of larvicide is appropriate because larvicides are specifically designed to target and control the larvae of insects. This class of pesticide is commonly used in various settings, particularly in the management of waterborne insect populations like mosquitoes, which can carry diseases. Larvicides work by interrupting the normal growth and development of the larvae, preventing them from maturing into adult forms that could contribute further to pest problems.

Fungicides are used to kill or inhibit the growth of fungi and are not effective against insect larvae. Rodenticides target rodents and are formulated to eliminate mouse and rat populations, which is unrelated to insect larvae. Herbicides are designed to control unwanted plants or weeds, and thus have no effect on insect life stages. Therefore, among the options provided, larvicide is the clear choice for targeting insect larvae effectively.