Temperature inversions are the best time to spray because there is no wind to move the spray droplets.

• A. True
• B. False
• C. It depends on the product
• D. Not safe at any time

Answer: (B)

Temperature inversions create a very stable layer of air near the ground with little vertical mixing. That stability means droplets don’t get dispersed upward and away like they do in well-mmixed air. Instead, droplets can stay near the surface and can be carried by even small air movements or surface eddies, increasing the chance of off-target deposition. So spraying during an inversion is not safer or better—the risk of drift is actually higher, not zero. The best practice is to spray when the air is well mixed and winds are moderate, following product labels and drift-management guidelines.