Inżynieria Rolnicza
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Title : Spray application quality as affected by spray volume, nozzles and phenological growth stage of apples
Key words : spray deposition, spray coverage, spray quality, application parameters, orchard spraying
Summary :

The objective of the studies was to determine the influence of spray volume and a nozzle type on product deposition and distribution in apple tree canopies, as well as spray coverage on leaves obtained in different phenological growth stages. The spray volumes 250, 500 and 750 l∙ha-1 were applied with fine spray and coarse spray nozzles generating droplets of VMD around 150 µm and 400 µm respectively. A cross-flow sprayer Munckhof was used at driving velocity 5.0 km∙h-1 to apply fluorescent dye as a spray liquid. During flowering the greatest deposition was obtained at the spray volume 250 l∙ha-1 applied with the coarse spray nozzles. The spray volume 750 l∙ha-1 resulted in the best coverage in the tree centre. During development of fruit, deposition in the canopy centre was at a constant level irrespective of the spray volume and a droplet size. At the stage of fruit maturity the best coverage was observed for fine spray nozzles and spray volumes 500 and 750 l∙ha-1. The use of coarse spray nozzles resulted in coverage reduction by 50%.

Please use the following format to cite the selected article : Świechowski, W., Doruchowski, G., Godyń, A., Hołownicki, R. (2014). Spray application quality as affected by spray volume, nozzles and phenological growth stage of apples. Inzynieria Rolnicza, 1(149), 229-237.
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