Which of the following pest control methods is most likely to drift to non-target sites?

Aerosols are the pest control method that is most likely to drift to non-target sites. This method involves the application of pesticides in a fine mist, which allows the particles to become airborne and travel significant distances with the wind. The small droplet size increases the potential for drift, making it more challenging to control where the pesticide lands.

In contrast, baits, dusts, and granulars are formulated in ways that generally limit their movement. Baits are often placed directly in areas where pests are active, thus reducing the likelihood of drifting. Dusts, while they can also be airborne, tend to settle more quickly due to their larger particles, making them less prone to drifting compared to aerosols. Granulars consist of larger particles that are intended to be applied directly to the ground or specific surfaces, thus minimizing off-target movement.

Understanding the characteristics of these application methods is essential for effective pest management and minimizing the impact on non-target organisms. This is why considering the potential for drift when choosing an application method is crucial for public health pest control practices.