What does a surfactant do in a pesticide spray?

What does a surfactant do in a pesticide spray?

• A. Increase the volatility of the solution
• B. Decrease the surface tension of water and improve spreading
• C. Act as the active ingredient
• D. Change the color of the solution

Answer: (B)

Surfactants in pesticide sprays act as wetting agents that lower the surface tension of the spray solution. By reducing surface tension, the liquid spreads more easily over leaf surfaces, especially those that are waxy or hydrophobic, creating a more even and adherent film. This improves coverage and contact between the active ingredient and the target pests, making the spray more effective. They’re adjuvants, not the active ingredient themselves, so they don’t determine how potent the pesticide is, nor do they inherently change the spray’s volatility or color.

Surfactants in pesticide sprays act as wetting agents that lower the surface tension of the spray solution. By reducing surface tension, the liquid spreads more easily over leaf surfaces, especially those that are waxy or hydrophobic, creating a more even and adherent film. This improves coverage and contact between the active ingredient and the target pests, making the spray more effective. They’re adjuvants, not the active ingredient themselves, so they don’t determine how potent the pesticide is, nor do they inherently change the spray’s volatility or color.