How can one avoid crop injury during herbicide application?

• A. Increase the application rate
• B. Monitor weather conditions
• C. Apply herbicides only at night
• D. Select the cheapest herbicide available

Answer: (B)

Monitoring weather conditions is essential for avoiding crop injury during herbicide application because weather has a significant impact on how herbicides behave once applied. Factors such as wind speed, temperature, humidity, and recent rainfall can affect the efficacy and potential drift of herbicides.

For instance, applying herbicides during windy conditions can lead to drift, where the chemicals move away from the intended target area, potentially harming nearby crops. Similarly, high temperatures can increase evaporation rates, which might lead to a more concentrated application than intended and elevate the risk of crop injury. Conversely, applying when moisture is anticipated can aid in absorption and diminish the chances of injury.

Understanding these variables allows an applicator to determine the most effective and safest time to apply herbicides, thus protecting the crops while ensuring effective weed control.