Spray drift from a Remotely Piloted Aerial Application System (RPAAS) was compared to a tractor mounted boom sprayer. Each platform consisted of two different spray nozzles that produced a medium and a coarse spray droplet spectrum to apply a 2 GPA application rate. The RPAAS was operated with a 10 foot boom height while the tractor mounted spray boom was positioned 24“ above the ground. A spray solution of water and fluorescent dye was used for all treatments. Spray deposition was measured by Mylar cards both in-swath and downwind out to 100 m. Spray drift was measured from the downwind edge of the swath out to 50 m. Each treatment was replicated 12 times.

Spray Drift Characterization of Hydraulic Spray Nozzles for Remotely Piloted Aerial Application Systems

ACS Fall 2021

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