What is a major disadvantage of using aerosols in pesticide application?

The major disadvantage of using aerosols in pesticide application is the risk associated with inhalation and drift. When pesticides are applied in aerosol form, the tiny droplets or particles can easily become airborne. This increases the likelihood of unintended exposure to non-target organisms, including humans, pets, and beneficial insects. The fine particles can be inhaled, posing health risks, especially to those who are sensitive or allergic. Additionally, aerosol pesticides can drift away from the intended application site due to wind or air currents, affecting surrounding areas and potentially leading to contamination of water sources or harm to wildlife.

The other options represent aspects that may not universally apply to aerosol applications. For instance, cost-effectiveness can vary based on the specific pesticide and application method chosen. Effective targeting is generally an advantage of aerosolization, as the fine mist can penetrate foliage more thoroughly. Environmental stability pertains to how long the pesticide remains active in the environment, which is not inherently a disadvantage of aerosol use itself.