What are adjuvants?

• A. Active killing agents
• B. Additives that improve performance
• C. Solvents for mixing
• D. Coatings that seal the product

Answer: (B)

Adjuvants are additives that improve how well a pesticide product works. They’re not active killing agents themselves; instead they modify the product’s behavior to enhance performance. For example, surfactants reduce surface tension to help the spray spread and wet leaves, spreaders help cover more surface area, stickers help droplets stick to plant surfaces so they stay longer, and drift control agents keep the spray from moving off-target. Adjuvants can also improve compatibility with hard water or other tank mix partners, and they can boost penetration or persistence on the target.

This is different from active ingredients that actually kill pests, from solvents that dissolve the active ingredient, or from coatings that seal a product. Using the right adjuvant can be especially helpful on waxy or rough surfaces, under dry conditions, or when aiming for better coverage and longer-lasting protection—always following label recommendations to avoid crop injury or reduced efficacy.