Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-15T11:15:51.569Z Has data issue: false hasContentIssue false
  • English
  • Français

Spray Droplet Size for Water and Paraffinic Oil Applied at Ultralow Volume

Published online by Cambridge University Press:  12 June 2017

James E. Hanks  and
Chester G. McWhorter
James E. Hanks
Affiliation:
Applic. Tech. Res. Unit, Agric. Res. Serv., U.S. Dep. Agric, Stoneville, MS 38776
Chester G. McWhorter
Affiliation:
Applic. Tech. Res. Unit, Agric. Res. Serv., U.S. Dep. Agric, Stoneville, MS 38776
Get access Rights & Permissions [Opens in a new window]

Abstract

Spray droplet size of water and paraffinic oil was affected by air pressure, nozzle type, and liquid flow rate when applied with an ultralow volume (ULV), air-assist sprayer. Volume median diameters of water were generally larger than oil at constant air pressure and liquid flow rate. Droplet size decreased as air pressure increased, but increased as liquid flow rate increased. Volume median diameters of water droplets ranged from 41 to 838 μm and from 16 to 457 μm with oil when atomized at air pressures ranging from 14 to 84 kPa. Relative spans ranged from 1.2 to 18.0 and 2.0 to 7.2 for water and oil, respectively.

Keywords

Air-assist sprayercarrierdiluentspray particlespray volume
Type
Feature
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 799 - 807
Copyright
Copyright © 1994 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Adams, A. J., Chappie, A. C., and Hall, F. R. 1990. Droplet spectra for some agricultural fan nozzles, with respect to drift and biological efficiency. p. 156–159 in Bode, L. E., Hazen, J. L., and Chasin, D. G., eds. Pesticide Formulations and Application Systems: 10th Vol. ASTM STP 1078. Amer. Soc. Test. Mater., Philadelphia, PA.CrossRefGoogle Scholar
2. Barrentine, W. L. and McWhorter, C. G. 1988. Johnsongrass (Sorghum halepense) control with herbicides in oil diluents. Weed Sci. 36: 102–110.CrossRefGoogle Scholar
3. Bode, L. E., Butler, B. J., and Wax, L. M. 1985. Use of electrostatics, rotary atomizers, and vegetable oils in low-volume ground application. p. 78–87 in Kanako, T. M. and Spicer, L. D., eds. Pesticide Formulation and Application Systems: 4th Vol. ASTM STP 875. Amer. Soc. Test. Mater., Philadelphia, PA.Google Scholar
4. Bryson, C. T., Wills, G. D., and Quimby, P. C. 1990. Low volume invert emulsions for purple nutsedge (Cyperus rotundus) control. Weed Technol. 4:907–909.CrossRefGoogle Scholar
5. Carpenter, W. D. and Derting, C. W. 1992. What is in the future? p. 579–606 in McWhorter, C. G. and Abernathy, J. R., eds. Weeds of Cotton: Characterization and Control. The Cotton Foundation, Memphis, TN.Google Scholar
6. Hall, F. R. 1985. Improving agrochemical and fertilizer application technology. Agricultural Research Institute, Bethesda, MD. 148 p.Google Scholar
7. Hanks, J. E. and McWhorter, C. G. 1991. Variables affecting the use of positive displacement pumps to apply herbicides in ultralow volume. Weed Technol. 5:111–116.CrossRefGoogle Scholar
8. Haq, K., Akesson, N. B., and Yates, W. E. 1983. Analysis of droplet spectra and spray recovery as a function of atomizer type and fluid physical properties. p. 67–82 in Kaneko, T. M. and Akesson, N. B., eds. Pesticide Formulations and Application Systems: 3rd Vol. ASTM STP 828. Amer. Soc. Test. Mater., Philadelphia, PA.Google Scholar
9. Matthews, G. A. 1979. Pesticide Application Methods. Longman, Inc., New York, NY. 306 p.Google Scholar
10. McWhorter, C. G., Barrentine, W. L., and Hanks, J. E. 1992. Postemergence grass control with herbicides applied at ULV in paraffinic oil. Weed Technol. 6:262–268.CrossRefGoogle Scholar
11. McWhorter, C. G., Fulgham, F. E., and Barrentine, W. L. 1988. An air-assist spray nozzle for applying herbicides in ultralow volume. Weed Sci. 36:118–121.CrossRefGoogle Scholar
12. McWhorter, C. G. and Gebhardt, M. R. 1987. Preface page iii in C. McWhorter, G. and Gebhardt, M. R., eds. Methods of Applying Herbicides. Weed Sci. Soc. Am., Champaign, IL.Google Scholar
13. McWhorter, C. G. and Hanks, J. E. 1992. Effect of spray volume and pressure on postemergence johnsongrass (Sorghum halepense) control in soybeans (Glycine max). Weed Technol. (In Press).CrossRefGoogle Scholar
14. McWhorter, C. G. and Hanks, J. E. 1992. Spray equipment for applying herbicides in ultralow-volume. Proc. 1st Intl. Weed Control Congr., Melbourne, Australia 1:165–167.Google Scholar