Spray modifiers that increase droplet size and reduce drift are known as?

• A. Surfactants
• B. Stickers
• C. Penetrants
• D. Drift Reduction

Answer: (D)

The concept here is controlling where spray droplets go. Droplet behavior in the air affects drift, and modifiers that make droplets larger and less prone to being carried away are called drift reduction agents. By increasing viscosity or adding polymers, these modifiers make droplets heavier and more likely to deposit on the target rather than drift off with the wind. They can also help droplets adhere to leaf surfaces after landing, reducing loss.

Surfactants, while useful for spreading and wetting, often create finer droplets and can actually increase drift risk. Stickers help droplets stick to the surface but don’t inherently enlarge droplet size or reduce drift. Penetrants are about getting the chemical into the plant, not about drift control. So the term that best fits “increase droplet size and reduce drift” is drift reduction.