What are the two main forms of drift that move pesticides downwind to non-target areas?

What are the two main forms of drift that move pesticides downwind to non-target areas?

• A. Groundwater intrusion
• B. Vapor drift and particle drift
• C. Direct rain
• D. None of the above

Answer: (B)

Pesticide drift is the unwanted movement of pesticide through the air away from the target area. The two main forms are vapor drift and particle drift. Vapor drift happens when some pesticides volatilize after application and become airborne, riding air currents to deposit elsewhere. Particle drift occurs when spray droplets or particles are carried downwind by wind, with finer droplets being more prone to drifting farther. Groundwater intrusion involves movement through soil into groundwater, which is a subsurface pathway, not air drift. Direct rain is wash-off from the surface, not airborne drift. So, the two primary forms of drift you need to recognize are vapor drift and particle drift.

Pesticide drift is the unwanted movement of pesticide through the air away from the target area. The two main forms are vapor drift and particle drift. Vapor drift happens when some pesticides volatilize after application and become airborne, riding air currents to deposit elsewhere. Particle drift occurs when spray droplets or particles are carried downwind by wind, with finer droplets being more prone to drifting farther. Groundwater intrusion involves movement through soil into groundwater, which is a subsurface pathway, not air drift. Direct rain is wash-off from the surface, not airborne drift. So, the two primary forms of drift you need to recognize are vapor drift and particle drift.