Impact of sprayer drone flight height on droplet spectrum in mountainous coffee plantation

ABSTRACT Weather conditions and sprayer operating parameters influence spray quality. Unmanned aerial vehicles are considered a modern, useful, very efficient technological tool in the application of pesticides, as they carry out punctual spraying, reduce environmental public health problems. The objective this study was to characterize spraying quality carried with an unmanned vehicle function flight height target position coffee plantation mountainous region. Three heights (2.5, 3.0, 4.0 m) were used, targets placed at top bottom plant. For each plant, six water sensitive papers on plant bottom. CIR 1.5 software applied determine coverage percentage, drop density, volume median diameter, volumetric diameter corresponding 10 90%, numerical relative amplitude. results showed that only influenced 10% volume, percentage. canopy all evaluated parameters. In plantations, system using is more for lower part