Özet:

Agriculture is a large and serious sector developing on a global basis. An important research subject in agriculture is the pesticide applications performed by spraying method. One of the objectives of spray application technologies is to provide using at the recommended dosage of pesticides at the right time by using the appropriate application techniques in order to reduce the level of pest or disease factors at crop production. In this study, the effects of flow parameters on droplet diameter of single hollow-cone nozzle used on conventional sprayers were investigated. For this purpose, three different nozzle-surface distances (70 cm, 85 cm, 100 cm), three different operational pressure (6 bar, 8 bar, 10 bar) and three different nozzle orifice diameters were determined as flow parameters under conditions of constant speed and spray angle. The experiments were carried out in duplicate at different times. After spray application, the droplet spot images obtained from the water sensitive paper surfaces were processed and the volumetric diameter and homogeneity values ​​were determined. In order to examine the effect of the flow parameters on droplet diameter, the charts were drawn and the variations were interpreted. In general, the characteristic droplet diameters were decreased and the homogeneity coefficient increased on the conditions of the same nozzle orifice diameter and spray distance as the operational pressure increased. Comparing nozzle orifice diameters for the same operational pressure and spraying distance, it was observed that the droplet diameter increased for the nozzles with large orifice diameter and the homogeneity value deteriorated.

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