What class of pesticides is commonly used in mosquito control?

The most appropriate class of pesticides used in mosquito control is insecticides. Mosquitoes are a type of insect, and insecticides are specifically designed to target and eliminate various insect species. They work by disrupting the biological functions of insects, which can include affecting their nervous system, metabolism, or reproduction.

In contrast, other types of pesticides serve different purposes. Nematicides are specifically targeted at nematodes, which are microscopic worms, and would be ineffective against mosquitoes. Herbicides are designed to control unwanted plants (weeds) and thus do not have any impact on insect populations. Rodenticides target rodents and are also not relevant to mosquito control.

Therefore, the use of insecticides is essential in managing mosquito populations effectively, making them the correct answer.