How do temperature inversions affect herbicide application?

Temperature inversions have significant implications for herbicide application, particularly due to their ability to trap cooler air near the ground. During a temperature inversion, warm air overlays cooler air, which prevents the cooler air, along with any pesticides that may be present, from rising. This creates a stable atmosphere that can lead to increased potential for herbicide drift.

When herbicides are applied on a windy day or under a temperature inversion, the drift can carry the chemicals to unintended areas, potentially affecting non-target plants and harming other ecosystems. The combination of trapped air and low wind speeds means that any particulate matter, including herbicides, can remain suspended and travel over greater distances than intended.

Understanding this phenomenon is critical for ensuring that herbicides are applied effectively and safely, aligning with best practices to reduce off-target effects and protect the environment and surrounding communities. In summary, temperature inversions pose a serious risk during herbicide applications by enhancing the likelihood of drift due to air stratification.