What is the main problem associated with flying too low during granule application?

Flying too low during granule application primarily raises concerns about increased prop wash effects. When an aircraft operates at a lower altitude, the rotor or propeller creates significant turbulence beneath the aircraft. This turbulence can disturb the distribution of granules being applied, causing them to scatter unevenly on the target area.

This is particularly critical for granule applications, as even distribution is essential for effective treatment. Uneven application can lead to insufficient coverage in some areas and excessive amounts in others, which can negatively affect the intended outcome, such as pest control or fertilization.

While visibility issues can arise when flying low, they are not the main concern specifically linked to granule application. Spray drift is more relevant to liquid applications, as it refers to the movement of product away from the target area due to wind or other factors. Higher fuel consumption might occur at different altitudes, but it isn't the primary concern when it comes to granule application. Therefore, the main problem associated with flying too low during this specific application process is indeed the increased prop wash effects, which can severely compromise the effectiveness of the application.