When should you not apply low volume sprays (those having smaller droplet size)?

When should you not apply low volume sprays (those having smaller droplet size)?

• A. During early morning calm
• B. During overcast conditions
• C. During high wind speeds
• D. During periods of high temperature or low humidity

Answer: (D)

Small droplets from low-volume sprays are easy to carry off-target by air flows and to evaporate, turning into even finer particles before they reach the target. Hot, dry air speeds up evaporation and keeps droplets small, increasing drift and reducing deposition where you want the product. So, you should avoid using low-volume sprays when temperatures are high or humidity is low, because those conditions make drift and poor deposition much more likely. In cooler or more humid conditions, the droplets stay larger for longer and deposition improves.

Small droplets from low-volume sprays are easy to carry off-target by air flows and to evaporate, turning into even finer particles before they reach the target. Hot, dry air speeds up evaporation and keeps droplets small, increasing drift and reducing deposition where you want the product. So, you should avoid using low-volume sprays when temperatures are high or humidity is low, because those conditions make drift and poor deposition much more likely. In cooler or more humid conditions, the droplets stay larger for longer and deposition improves.