Which application method would you typically not use for outdoor environments due to the risk of drift?

The application method that is typically not used in outdoor environments due to the risk of drift is air blast sprayers. Air blast sprayers are designed to create a high-velocity air stream that atomizes the liquid pesticide, allowing it to reach the target area effectively. However, this method can also generate fine droplets that can be easily carried away by wind, resulting in drift to non-target areas. Drift is a significant concern in outdoor environments as it can lead to unintentional exposure of nearby plants, animals, or humans to pesticides, which can be harmful.

In contrast, hand-operated granular applicators, chemigation, and liquid pesticide applications can be managed to minimize drift risk. Granular applicators distribute pesticide in a solid form, which is less likely to drift compared to liquid forms. Chemigation involves applying pesticides through irrigation systems and can be carefully controlled to target specific areas without the same risk of drift as aerial applications. Liquid pesticide applications, while they can drift, allow for more control over droplet size and application speed, mitigating the potential for drift when applied using appropriate techniques and weather conditions.