What is the effect of a fixed wing aircraft's slipstream turbulence on droplet deposition when spraying from above 10 feet?

The correct answer highlights the nature of slipstream turbulence created by fixed-wing aircraft during aerial applications. At heights exceeding 10 feet, the slipstream from the aircraft can cause a significant amount of turbulence. This turbulence can disrupt the intended path of the pesticide droplets as they descend toward the target area.

When the aircraft is flying at a greater altitude, the vertical speed at which droplets fall is altered by the turbulence, which can scatter the droplets and lead to less effective deposition on the target surfaces. As a result, the pesticide may not reach the intended plants or areas with the desired concentration, ultimately impacting the effectiveness of the application. This is why the answer indicates that the effectiveness of droplet deposition is diminished when using fixed-wing aircraft from higher altitudes.

In contrast, other options may suggest either that the effect is more pronounced, does not exist, or varies consistently; however, these options do not accurately reflect the consistent decrease in effective droplet deposition that is characteristic of increased turbulence at higher altitudes. The key takeaway is that increased slipstream turbulence from fixed-wing aircraft flying above 10 feet can adversely affect the application, leading to the conclusion that the effectiveness is reduced.