Key points

• Use accurate forecast information to help plan spraying activities

• Always measure and record weather parameters at the site of the application before, during and on completion of spraying operations

• Wind direction and wind speed are critical for assessing suitable conditions and potential risks

• Temperature and humidity (or Delta T value) can assist in understanding evaporation and spray-drift risk, but can also identify potential effects on efficacy

• Always follow the label directions for appropriate conditions for spraying, including downwind buffers or no-spray zones that are calculated specific to active ingredient, formulation, application equipment and wind speed

• Consider what weather monitoring equipment will best suit your enterprise