What is the primary implication of having a high stability ratio?

A high stability ratio indicates that the pesticide formulation is more stable in the atmosphere, which can lead to a greater potential for pesticide drift. This drift occurs when pesticide particles are carried away from the target area by wind or air currents. When a pesticide has a high stability ratio, it remains airborne longer, increasing the likelihood that it will drift away from the intended application site. This is critical information for aerial applicators, as it emphasizes the need for careful planning and application techniques to minimize environmental impact and ensure effective pest control.

The other options do not accurately capture the implications of a high stability ratio in the context of aerial application. Options related to insect populations, water evaporation rates, and air quality are not directly influenced by the stability ratio concerning drift potential.