Phytotoxicity can occur because of

• A. Drift
• B. Both
• C. Temperature
• D. Low Humidity

Answer: (B)

Phytotoxicity happens when a pesticide injures non-target plants. This can occur from spray droplets moving off target (drift) and from weather conditions that affect how a product behaves and is absorbed by plants. Drift brings the chemical onto nearby crops or ornamentals, causing symptoms like leaf burn or distortion. Weather factors, especially temperature, can influence volatility, deposition, and plant uptake, increasing the likelihood of injury. Since both off-target movement and environmental conditions can cause phytotoxicity, the option that reflects both factors is the best choice. To reduce risk, apply with drift-control measures and avoid spraying under adverse weather (hot, dry, or windy conditions).