What is a potential issue when the temperature exceeds 65°F regarding herbicides?

When the temperature exceeds 65°F, one significant concern is the volatilization of herbicides. Volatilization refers to the process by which a substance changes from a liquid or solid state into vapor or gas. Many herbicides are susceptible to this phenomenon, especially the ones that contain certain active ingredients. As temperatures rise, these chemicals can evaporate more readily into the atmosphere. This not only reduces their effectiveness on the target plants but can also lead to unintended drift, where the herbicide moves away from the intended application area, potentially harming other plants or affecting the environment.

Understanding the effects of temperature on herbicide behavior is crucial for safe and effective usage. This highlights the importance of timing applications to avoid high temperatures, ensuring better control of weeds and minimizing collateral damage from drift.