Özet:

Considering the harmful effects of pesticides, it is necessary to apply them very precisely. The selection of nozzle in pesticide applications is a matter of particular attention. The size of the droplet is very important for fighting with disease and pest. Coarser droplets run-off from the plant while finer droplets are prone to drift. For this reason, it is necessary to determine the droplet diameter in order to reduce drift. Volume median diameter is commonly used for understanding droplet size in the spray pattern. Due to the direct effect of the size of the droplet, a large number of studies have been conducted on the nozzles. But there are still some missing parts. For this reason, every year the nozzle manufacturers put a new type of nozzle on the market. In this study, the volume median diameter of different sized (0.8 and 1.0) hollow cone nozzles widely used in Turkey at different pressures (6, 9, 12 bar) in constant temperature and relative humidity were determined by Oxford Visisizer-PDIA (Particle Droplet Image Analysis). It has been determined that the volume median diameter of these two sizes of nozzles, which are tested at lower pressures, is very close to each other.

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