What size range do driftable fines typically fall into?

Driftable fines are typically defined as particles that are small enough to be carried by air currents, significantly impacting the drift of pesticides during aerial application. The correct range for driftable fines is 10 to 50 microns, as particles within this size can be easily lifted by wind and contribute to drift away from the intended target area.

Particles in the size range of 50 to 200 microns are generally considered larger and tend to fall to the ground more quickly due to their weight, making them less susceptible to drift. In contrast, sizes above 200 microns, such as those ranging from 200 to 300 microns or 300 to 500 microns, are even less likely to drift because they are too heavy to remain airborne over significant distances. Therefore, understanding the size range of driftable fines is crucial for ensuring effective and safe aerial applications, as this knowledge helps in selecting the appropriate droplet sizes and application techniques to minimize pesticide drift.