What type of information is essential in a pesticide application record regarding weather data?

• A. Weather conditions such as wind speed, temperature, and humidity.
• B. Only the date of application.
• C. Only the crop type being treated.
• D. Only the applicator’s initials.

Answer: (A)

Weather during a pesticide application drives how well the product will perform and how much drift risk there is, so recording wind speed, temperature, and humidity is essential. These conditions directly affect drift potential, volatilization, evaporation, and crop injury, and they help determine whether the application met label requirements and safety guidelines. By documenting these conditions, you can assess why efficacy might vary and provide a clear record for compliance and future planning.

Storing only the date, or only the crop type, or only the applicator’s initials misses the crucial environmental factors that influence how the pesticide behaves in the field. While those details are part of a record, they don’t capture the weather conditions that determine application outcome and safety.