Which condition is ideal for applying herbicides to prevent non-target damage?

Applying herbicides in calm weather is ideal for preventing non-target damage because wind can carry the chemical off-target, potentially harming desirable plants and surrounding wildlife. When conditions are calm, the herbicide will drift less, allowing for more precise application and reducing the risk of unintended exposure to sensitive areas. This controlled application helps ensure that the treatment effectively targets only the intended pests or weeds, thereby enhancing the efficacy of the herbicide while protecting beneficial species and reducing environmental impact.

In contrast, windy conditions can significantly increase the risk of drift, making it difficult to contain the herbicide within the target area. High humidity can affect how the herbicide behaves in the air, potentially leading to greater evaporation or changes in the physical properties of the chemical, while wet soils might increase the risk of runoff, which also poses a threat to non-target plants. Thus, calm weather stands out as the best condition for herbicide application.