Under which conditions should you not spray to prevent drift?

Under which conditions should you not spray to prevent drift?

• A. When winds are calm
• B. During rainfall
• C. When winds are blowing toward sensitive areas
• D. When winds are over 10 mph, wind is blowing toward sensitive areas, winds are shifting and during periods of calm/inversion

Answer: (D)

Spray drift happens when droplets are carried away from the target by air movement, so avoiding spraying under conditions with high drift potential is essential. The conditions described—winds over about 10 mph, wind blowing toward sensitive areas, winds shifting direction, and during calm periods or atmospheric inversions—greatly increase the chance that droplets will move off target or linger near the surface. Because these factors together create the strongest drift risk, they indicate you should not spray. While calm winds alone reduce drift, inversions or shifting winds can still cause problems, and spraying during rainfall introduces other issues like wash-off and reduced efficacy. Winds toward sensitive areas are risky by themselves, but the combination of all these factors most clearly signals to skip spraying to prevent drift.

Spray drift happens when droplets are carried away from the target by air movement, so avoiding spraying under conditions with high drift potential is essential. The conditions described—winds over about 10 mph, wind blowing toward sensitive areas, winds shifting direction, and during calm periods or atmospheric inversions—greatly increase the chance that droplets will move off target or linger near the surface. Because these factors together create the strongest drift risk, they indicate you should not spray. While calm winds alone reduce drift, inversions or shifting winds can still cause problems, and spraying during rainfall introduces other issues like wash-off and reduced efficacy. Winds toward sensitive areas are risky by themselves, but the combination of all these factors most clearly signals to skip spraying to prevent drift.