Ace the Washington Pesticide Laws & Safety Test 2026 – Spray Your Way to Success!

Active ingredient is the specific chemical or substance in a product mixture that has the desired function of controlling pests. In the context of pest control, the term "pesticide" refers to the entire product mixture, which includes both active and inactive ingredients. Therefore, choice C and D (pesticide formulation and adjuvant) are incorrect as they refer to the overall product rather than the specific chemical. Inert ingredient, choice B, refers to a substance that is not intended to have a specific effect on pests, but is necessary for the formulation of the pesticide. As such, it does not control the pests and is also incorrect. Active ingredient, choice A, is the only option that accurately describes the chemical responsible for controlling pests in a product mixture.