What type of droplets tend to become trapped in the wingtip vortex zones during spraying?

Smaller droplets tend to become trapped in the wingtip vortex zones during spraying due to their susceptibility to atmospheric disturbances and their lighter weight. The wingtip vortex, which is the rotating air generated at the tips of the wings, creates areas of lower pressure that small droplets can easily get caught in, causing them to linger in the vortex for longer periods. This phenomenon can lead to increased drift, where the smaller droplets can be carried away from the intended target area by wind currents. Additionally, smaller droplets have a higher surface area to volume ratio, which means they are more influenced by air movement compared to larger droplets. This understanding is crucial in aerial application as it informs decisions about droplet size used for effective spraying and minimizing off-target drift.