Which of the following contributes to wind pollution during pesticide application?

High wind speeds significantly contribute to wind pollution during pesticide application. When pesticide spraying occurs in windy conditions, the force of the wind can carry pesticide droplets away from the target area, leading to drift. This drift can contaminate nearby crops, water sources, and non-target species, including beneficial insects and wildlife. Additionally, the off-target deposition of pesticides due to wind can cause environmental and health issues.

In contrast, other factors like low-pressure sprayers are designed to reduce drift, and optimal temperature and humidity generally help to maintain the effectiveness of the pesticide application and minimize evaporation. Low humidity, while it can affect pesticide performance, does not directly enhance wind pollution as high winds do. Thus, high wind speeds are the primary factor leading to increased risk of wind pollution during pesticide application.