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

Published online by Cambridge University Press:  12 June 2017

Chester G. McWhorter ,
Floyd E. Fulgham  and
William L. Barrentine
Chester G. McWhorter
Affiliation:
South. Weed Sci. Lab., Agric. Res. Serv., U.S. Dep. Agric., Stoneville, MS 38776
Floyd E. Fulgham
Affiliation:
South. Weed Sci. Lab., Agric. Res. Serv., U.S. Dep. Agric., Stoneville, MS 38776
William L. Barrentine
Affiliation:
Delta Branch, Mississippi Agric. and For. Exp. Stn., Stoneville, MS 38776
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Abstract

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.

Keywords

ULVLVatomizing nozzleherbicide applicationparaffinic oil
Type
Special Topics
Information
Weed Science , Volume 36 , Issue 1 , January 1988 , pp. 118 - 121
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

Literature Cited

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