Too wide or too narrow overlapping of spray passes will result in:

Too wide or too narrow overlapping of spray passes can lead to uneven application patterns, which is essential in aerial application. When the overlap between spray passes is incorrect, either too little or too much chemical may be applied in certain areas. This can result in some sections of the treated area receiving insufficient product while others may get an excessive amount.

An uneven application can negatively impact the effectiveness of pest control, weed management, or crop protection measures, as it can leave some areas vulnerable while saturating others. It is crucial for aerial applicators to maintain proper overlap to ensure uniform treatment, which is vital for achieving the desired agronomic outcomes, maximizing efficiency, and minimizing waste.

Considering the other options, flight hazards could occur from various factors during aerial applications, but they do not directly relate to spray pass overlap. Off-target drift might be influenced by many different variables including wind and equipment calibration rather than solely by overlap. As for disabling the DGPS system, while it may affect navigation during application, it is not directly tied to the repercussions of spray pattern overlap.