According to pesticide regulations, which of the following is not considered a pesticide?

Fertilizers are not classified as pesticides because their primary function is to provide essential nutrients to plants, rather than to control pests or diseases. Regulations define pesticides as substances intended to prevent, destroy, repel, or mitigate any pest, including insects, weeds, and pathogens. In contrast, insecticides, herbicides, and fungicides are all specifically designed to target and manage pests within those respective categories. Insecticides control insect populations, herbicides manage unwanted plants or weeds, and fungicides are used to eliminate or prevent fungal infections. Since fertilizers do not serve a pest control purpose, they fall outside the definition of a pesticide as outlined in regulatory standards.