What indicates a high potential for drift in a herbicide like 2,4-D?

A high potential for drift in a herbicide like 2,4-D is indicated by high volatility. Volatility refers to the tendency of a substance to vaporize, and in the context of herbicides, a volatile herbicide can easily become airborne, especially under warm temperatures or windy conditions. This airborne movement can lead to the herbicide unintentionally affecting non-target plants or areas, which is known as drift.

Understanding the implications of high volatility is essential for effective herbicide application. When using products with high volatility, applicators must take extra precautions—such as choosing optimal application times and weather conditions—to reduce the risk of drift and potential damage to neighboring crops or sensitive areas. In contrast, low volatility would indicate a lower likelihood of drift, as such substances are less prone to vaporizing and spreading uncontrollably. The other options, while relevant to herbicide characteristics, do not directly indicate the potential for drift associated with volatility.