Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-10T05:50:21.874Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of CO2, N2, Air, and Nitrogen Salts on Spray Solution pH

Published online by Cambridge University Press:  12 June 2017

Ronald W. McCormick
Ronald W. McCormick*
Affiliation:
DowElanco, Field Research, Wayside, MS 38780-2557
Get access Rights & Permissions [Opens in a new window]

Abstract

Water samples from eight locations, ranging in pH from 7.1 to 8.5, were tested to determine the effect of carbon dioxide (CO2) pressurization on pH. After pressurization with CO2 the pH of the water decreased 1.8 to 4.1 pH units. An increase of 0.4 to 1.2 pH units occurred after the CO2 pressurized water exited a spray nozzle. The use of N2 or air as a pressurizing gas had very little effect on pH. The addition of diammonium phosphate, urea-ammonium nitrate (UAN)3, or ammonium sulfate had only minor effects on water pH. The addition of monoammonium phosphate reduced water pH to 4.6 to 5.5. The physical/chemical properties and activity of a herbicide may be altered with the change in spray solution pH by using CO2 to pressurize the spray solution.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acid, ethyl esterFertilizerUAN
Type
Notes
Information
Weed Technology , Volume 4 , Issue 4 , December 1990 , pp. 910 - 912
Copyright
Copyright © 1990 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. Anonymous. Classic technical bulletin, E. I. duPont de Nemours and Co., Ag Chem Dep., Wilmington, DE.Google Scholar
2. Baur, J. R., Bovey, R. W., Baker, R. D., and Riley, I. 1971, Absorption and penetration of picloram and 2,4,5-T into detached live oak leaves, Weed Sci. 19:138–141.Google Scholar
3. Chow, P.N.P., and MacGregor, A. W. 1983. Effect of ammonium sulfate and surfactants on activity of the herbicide sethoxydim. J. Pestic. Sci. 8:519–527.Google Scholar
4. Hatzios, K. K., and Penner, D. 1985. Interactions of herbicides with other agrochemicals in higher plants. Rev. Weed Sci. 1:1–63.Google Scholar
5. Jordan, D. L., and York, A. C. 1989. Effect of ammonium fertilizers and BCH 81508 S on antagonism with sethoxydim plus bentazon mixtures. Weed Technol. 3:450–454.Google Scholar
6. Moxness, K. D., and Lym, R. G. 1989. Environment and spray additive effects on picloram absorption and translocation in leafy spurge (Euphorbia esula). Weed Sci. 37:181–186.Google Scholar
7. Sargent, J. A., and Blackman, G. E. 1962. Studies on foliar penetration. I. Factors controlling the entry of 2,4-dichlorophenoxyacetic acid. J. Exp. Bot. 13:348–368.Google Scholar
8. Stumm, W., and Morgan, J. J. 1970. Aquatic Chemistry, p. 130–135. Wiley-Interscience, New York.Google Scholar
9. Wilson, B. J., and Nishimoto, R. K. 1975. Ammonium sulfate enhancement of picloram absorption by detached leaves. Weed Sci. 23:297–301.Google Scholar