ISHS Acta Horticulturae 372: Symposium on Engineering as a Tool to reduce Pesticide Consumption and Operator Hazards in Horticulture
ORCHARD SPRAYING - DEPOSITION AND AIR VELOCITIES AS AFFECTED BY AIR JET QUALITIES |
| Author: | S. Svensson |
| Keywords: | Air blast sprayer, application technology, cross-flow fan, fluorescent dye, plant protection |
| Abstract:
Apple trees were sprayed four times during the growing season with air blast sprayers with two different cross-flow fan configurations, producing converging air jets and horizontal, parallel jets, respectively. When converging air jets were used, deposition, measured on artificial targets with fluorescent dye, was 50 % higher and the distribution pattern in the canopy was more uniform. Maximum air velocities were measured in the same positions and correlated with the deposition results. Losses, detected as spray liquid behind the trees, appeared lower down (beneath the tree top level) when converging air jets were used. | |
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