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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

1. Arnold, A. J. and Pye, B. J. 1980. Spray application with charged rotary atomizers. Pages 109–117 in Walker, J. O., ed. Spraying Systems for the 1980's. Br. Crop Prot. Counc. Monogr. 24. Croydon, Great Britain.Google Scholar
2. Barrentine, W. L. and McWhorter, C. G. 1988. Johnsongrass (Sorghum halepense) control with herbicides in oil diluents. Weed Sci. 36:102–110.Google Scholar
3. Bode, L. E., Butler, B. J., and Wax, L. M. 1985. Use of electrostatics, rotary atomizers and vegetable oil in low-volume ground application. Pages 78–87 in Kaneko, T. M. and Spicer, L. D., eds. Pesticide Formulations and Application Systems. Fourth Symp. Am. Soc. Testing and Materials Pub. Code No. (PCN) 04-875000-48, Philadelphia, PA.Google Scholar
4. Coffee, R. A. 1980. Electrodynamic spraying. Pages 95–107 in Walker, J. O., ed. Spraying Systems for the 1980's. Br. Crop Prot. Counc. Monogr. 24. Croydon, Great Britain.Google Scholar
5. Elliott, J. G. and Wilson, B. J. 1983. The influence of weather on the efficiency and safety of pesticide application—the drift of herbicide. Br. Crop Prot. Counc., Lavenham Press, Ltd., Lavenham, Great Britain. 135 pp.Google Scholar
6. Frost, A. R. and Yates, W. E. 1981. A pulsed-jet atomizer for the production of sprays with narrow drop size ranges. Agric. Eng. Res. 26:357–366.Google Scholar
7. Law, S. E. 1978. Embedded–electrode electrostatic–induction spray-charging nozzles: theoretical and engineering design. Trans. Am. Soc. Agric. Eng. 21:1096–1104.Google Scholar
8. McWhorter, C. G. and Barrentine, W. L. 1988. Spread of paraffinic oil on leaf surfaces of johnsongrass (Sorghum halepense). Weed Sci. 36:111–117.Google Scholar