An Air-Assist Spray Nozzle for Applying Herbicides in Ultralow Volume

An air-assist spray nozzle was constructed to apply herbicides in oil or water at volumes as low as 2.3 L/ha. The spray was metered through a disc orifice inside the nozzle and forced into an airstream which atomized the liquid. The nozzle produced 16 to 54 spray droplets/cm2 with air pressures from...

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Bibliographic Details
Published in:Weed science 1988-01, Vol.36 (1), p.118-121
Main Authors: McWhorter, Chester G., Fulgham, Floyd E., Barrentine, William L.
Format: Article
Language:English
Subjects:
Air pressure
Atomization
Biological and medical sciences
BUSE
Chemical control
Diluents
Electrostatics
Fundamental and applied biological sciences. Psychology
HERBICIDAS
HERBICIDE
HERBICIDES
Hydraulics
Liquids
MISSISSIPPI
NOZZLES
Parasitic plants. Weeds
Phytopathology. Animal pests. Plant and forest protection
PULVERISATEUR
PULVERISATION
PULVERIZACION
PULVERIZADORES
Special Topics
Spray nozzles
SPRAYERS
SPRAYING
TOBERAS
Weeds
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Summary:An air-assist spray nozzle was constructed to apply herbicides in oil or water at volumes as low as 2.3 L/ha. The spray was metered through a disc orifice inside the nozzle and forced into an airstream which atomized the liquid. The nozzle produced 16 to 54 spray droplets/cm2 with air pressures from 3.4 to 62 kPa from a 2-mm outlet using a lightweight paraffinic oil. The number of spray droplet deposits produced with a paraffinic oil at 34 kPa increased from 7 droplets/cm2 with a 0.8-mm outlet to 48 droplets/cm2 with a 2.4-mm outlet. The nozzle was designed primarily to apply herbicides in oil at 2.3 to 4.7 L/ha, but it has the capability of applying 150 L/ha of oil or water.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500074543