Optimizati̇on of spray characteristics by taguchi method in herbal pesticide

In this thesis, it is aimed to reduce the amount of drug that can be mixed with environment, soil, air and water by minimizing the type of nozzle and the use of excess drugs by using Taguchi method in combating apple tree pests. For this purpose, nozzles of different diameters (0.85, 1.10, 1.5 micron) are sprayed at different heights (70, 85, 100cm), at different pressures (6, 8, 10 bar) and at different angles (0, 15, 30 degrees). studies were carried out to determine the spray characteristics of the drug. Sodium fluorescein was used in the experiments. In this study, the effects of nozzle-to-surface distance, spraying pressure, nozzle diameter and nozzle angle on droplet diameter and flow characteristics were investigated using Taguchi method. In the first stage, mean diameter values were determined. Volumetric Median Diameter was considered as performance characteristic and L9(34) orthogonal sequence was chosen as the experimental plan for the four parameters determined. When the Volumetric Median Diameter was calculated considering the performance characteristics, optimum results were obtained with 6 bar spraying pressure, 100 mm spraying distance, 30o nozzle angle and 1,10 micron nozzle diameter. Volumetric Median Diameter values were calculated by image processing method and the effect graphs of the parameters on the droplet diameter were drawn and interpreted.