Why are dust formulations usually not used outdoors on a large scale?

Dust formulations are typically not used outdoors on a large scale because they have a propensity to drift away from the target area. This drifting can occur due to even slight breezes or air movement, making it difficult to control where the pesticide will land. As a result, there is an increased risk of non-target exposure to the chemicals, which can pose hazards to beneficial insects, nearby plants, humans, and animals.

In contrast, other formulations such as granules or liquids are generally more stable and can be applied more precisely, reducing the chances of drift and associated risks. While dusts can be effective in specific situations, the risk of drift significantly limits their use in large outdoor applications where accuracy and safety are paramount.