Articles
ORCHARD SPRAYING – DEPOSITION AND AIR VELOCITIES AS AFFECTED BY AIR JET QUALITIES
Article number
372_10
Pages
83 – 92
Language
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.
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.
Publication
Authors
S. Svensson
Keywords
Air blast sprayer, application technology, cross-flow fan, fluorescent dye, plant protection
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