Which statement about weather conditions is correct when applying pesticides?

• A. Apply only under appropriate weather conditions to minimize drift
• B. Weather has no impact on drift
• C. Always apply during rain
• D. Never consider wind direction

Answer: (D)

Weather conditions strongly influence how far and where pesticide droplets will move after you spray. The best approach is to apply only under conditions that minimize drift and maximize target deposition. Wind speed and direction are key: a light to moderate, steady breeze that blows away from homes, water bodies, and non-target crops helps keep drift away from sensitive areas. Temperature and atmospheric stability also matter—avoid conditions with temperature inversions near the ground, which can trap and transport droplets unpredictably. Don’t spray when rain is imminent or when foliage is wet, since rain or moisture can wash off the product and reduce effectiveness. Humidity and droplet size play roles too; larger droplets drift less than fine ones. In short, the statement that you should apply only under appropriate weather conditions to minimize drift captures the essential practice, because weather directly affects drift and efficacy. The other ideas aren’t accurate: weather does impact drift, spraying during rain is not advised, and wind direction should always be considered to protect non-target areas.