Applying pesticides in favorable environmental conditions helps minimize phytotoxicity.

• A. Favorable environmental conditions
• B. High winds
• C. Heavy rainfall
• D. Extreme heat

Answer: (A)

Phytotoxicity is plant injury caused by pesticides, and weather conditions influence how a pesticide behaves on and in a plant. When conditions are favorable—moderate temperatures, light or no wind, and no imminent rain—the product tends to stay where it’s intended, is absorbed more predictably, and causes less stress to the plant. This reduces the chance of leaf burn, spotting, or growth inhibition that constitutes phytotoxicity. In contrast, high winds cause drift to non-target plants, heavy rainfall can wash or move the chemical in ways that harm sensitive tissues, and extreme heat can increase volatility or plant stress, both of which raise the risk of phytotoxic injury. So applying under favorable environmental conditions minimizes the potential for phytotoxicity.