Which of the following is not classified and regulated as a pesticide in Idaho?

Fertilizers are not classified and regulated as pesticides in Idaho because they serve a different purpose in agriculture and horticulture. While pesticides are substances designed to control pests, including insects, weeds, and diseases, fertilizers are used to provide essential nutrients to plants to promote growth. They do not have a direct action against pests.

In contrast, bactericides, desiccants, and adjuvants are all considered pesticides in different contexts. Bactericides are designed to kill bacteria, desiccants help to remove moisture from materials, thereby aiding in pest control, and adjuvants are substances added to pesticides to enhance their effectiveness. Understanding the specific roles of these substances is essential for anyone involved in pest management and agricultural practices.