During some spraying operations, less than half of the applied pesticide reaches the target area.

During some spraying operations, less than half of the applied pesticide reaches the target area.

• A. 25%
• B. 50%
• C. 75%
• D. 90%

Answer: (B)

Spray deposition efficiency is the portion of the applied pesticide that actually lands on the target. In real-world spraying, a substantial amount is lost to drift, interception by plant parts, evaporation, runoff, and other losses, so the target receives only about half or less of what is applied. That makes around 50% the best practical estimate for the amount reaching the target under typical conditions. The other figures describe much lower or much higher deposition than is commonly observed, so they’re not as representative of typical spray efficiency.

Spray deposition efficiency is the portion of the applied pesticide that actually lands on the target. In real-world spraying, a substantial amount is lost to drift, interception by plant parts, evaporation, runoff, and other losses, so the target receives only about half or less of what is applied. That makes around 50% the best practical estimate for the amount reaching the target under typical conditions. The other figures describe much lower or much higher deposition than is commonly observed, so they’re not as representative of typical spray efficiency.