The helicopters or drones are spraying fungicides on corn and soy beans. The fungicides are tested and labeled for aerial application. The fungicide controls and prevents a disaster call "Rust". The amount of "drift" of spray depends upon the wind.

Aerial application of the fungicide is designed to be targeted to the plant. It is safe and Carrie's an EPA registration number. The helicopters and drones are very aware of people and houses and will avoid flying over people and houses. Fungicides do not hurt pollinators such as bees. The "Carbon foot print" is less with helicopters and drones than with farm equipment sprayers. (Ground Application). To answer your question, Aerial Application of fungicides is safe.