Deposition of Hydraulic Spray Solution for Agricultural Use Under Controlled Temperature Conditions

Abstract

Agricultural research on hydraulic phytosanitary applications highlight significant influence losses by drift, influenced by the wind, water evaporation, size of the sprayed droplets and the type of product applied. It aimed to evaluate in the laboratory the influence of the syrup temperature and the nearby environment at the application nozzle in the deposition of the aqueous solution on the target. The syrup was prepared with distilled and deionized water and potassium chloride, and cooled in conventional refrigerator. The ambience was cooled using vortex tube with compressed air. We used a nozzle sprayer with an injection of CO2 by keeping constant parameters: time, application rates and wind. The target deposition rate was evaluated using electrical conductivity analysis. The experiment was carried out in blocks, in a split plots. The results showed that the reduction of the two analyzed temperatures caused an increase in the deposition on the target, emphasizing the influence of the syrup temperature. Keywords: Spray Efficiency, Located Air Cooling, Vortex Tube, Cooling the Pesticide Syrup.