What two types of ingredients make up a pesticide formulation?

• A. Active, Solvent
• B. Inert, Carrier
• C. Primary, Secondary
• D. Active, Inert

Answer: (D)

The key idea is that a pesticide formulation combines what actually kills the pest with what helps deliver and apply it. The active ingredient provides the pesticidal action, while inert ingredients carry, dissolve, or enable proper delivery, stability, and performance. So the two ingredients making up a formulation are the active ingredient and inert ingredients. Solvent is just one type of inert ingredient, not a separate category, which is why pairing active with solvent isn’t the standard way to describe formulations. The other options don’t reflect how formulations are categorized.