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Surfactant-Altered Rates of Chlorimuron and Metsulfuron Photolysis in Sunlight

Published online by Cambridge University Press:  12 June 2017

Sandra M. Thomas  and
S. Kent Harrison
Sandra M. Thomas
Affiliation:
Dep. Agron., Ohio State Univ., 2021 Coffey Road, Columbus, OH 43210
S. Kent Harrison
Affiliation:
Dep. Agron., Ohio State Univ., 2021 Coffey Road, Columbus, OH 43210
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Abstract

Two nonionic surfactants altered photolysis rates of chlorimuron and metsulfuron in aqueous solutions and on glass slides exposed to sunlight. Photolysis of both herbicides followed first-order kinetics over an 8-day exposure period. Chlorimuron half-lives in solution were 5.8, 3.7, and 2.7 days in the presence of no surfactant, oxysorbic, and octoxynol, respectively. The extrapolated half-life of metsulfuron in solution with no surfactant was 15.7 days, compared to half-lives of 2.9 and 1.5 days in solutions containing oxysorbic or octoxynol, respectively. With the exception of metsulfuron in the absence of a surfactant, rates of chlorimuron and metsulfuron photolysis on glass slides were approximately two- to fourfold slower, and surfactants had little or no effect on herbicide photolysis rates compared to those in aqueous solution. Extrapolated half-lives on glass ranged from 9.9 to 12.5 days for chlorimuron and from 7.6 to 11.7 days for metsulfuron. Presence of oxysorbic or octoxynol did not greatly alter rates of riboflavin-sensitized herbicide photolysis on glass but did increase photolysis rates of metsulfuron in aqueous solution containing riboflavin.

Keywords

Chlorimuron, 2-[[[[(4 - chloro - 6 - methoxy - pyrimidinyl)-amino]carbonyl]amino]sulfonyl]benzoic acidmetsulfuron, 2-[[[[(4-methoxy-6-methyl)-1,3,5-triazin-2-yl)amino]-carbonyl]amino]sulfonyl]benzoic acidoxysorbic, polyoxyethylene sorbitan monooleateoctoxynol, isoctyl phenyl polyethoxy ethanolAdditivesherbicide degradationphotodecompositionoxysorbicoctoxynolriboflavin
Type
Soil, Air, and Water
Information
Weed Science , Volume 38 , Issue 6 , November 1990 , pp. 602 - 606
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. Archer, A. J., Saltzman, S., Brates, N., and Dunkelblum, E. 1981. Photosensitized decomposition of terbacil in aqueous solutions. J. Agric. Food Chem. 29:707–711.CrossRefGoogle Scholar
2. Beyer, E. M. Jr., Duffy, M. J., Hay, J. V., and Schlueter, D. D. 1988. Sulfonylureas. Pages 117–189 in Kearney, P. C. and Kaufman, D. D., eds. Herbicides: Chemistry, Degradation, and Mode of Action. Vol. 3. Marcel-Dekker, Inc., New York.Google Scholar
3. Burkhard, N. and Guth, J. A. 1976. Photodegradation of atrazine, atraton and ametryne in aqueous solution with acetone as a photosensitizer. Pestic. Sci. 7:65–71.Google Scholar
4. Calvert, J. G. and Pitts, J. N. Jr. 1966. Photochemistry. John Wiley & Sons, New York. Pages 820–828.Google Scholar
5. Crosby, D. G. 1976. Herbicide photodecomposition. Pages 835–890 in Kearney, P. C. and Kaufman, D. D., eds. Herbicides: Chemistry, Degradation, and Mode of Action. Vol. 2. Marcel-Dekker, Inc., New York.Google Scholar
6. Crosby, D. G. and Tutass, H. O. 1966. Photodecomposition of 2,4-dichlorophenoxyacetic acid. J. Agric. Food Chem. 14:596–599.Google Scholar
7. Gear, J. R., Michel, J. G., and Grover, R. 1982. Photochemical degradation of picloram. Pestic. Sci. 13:189–194.Google Scholar
8. Harrison, S. K. and Wax, L. M. 1986. The effect of adjuvants and oil carriers on photodecomposition of 2,4-D, bentazon, and haloxyfop. Weed Sci. 34:81–87.Google Scholar
9. Hautala, R. R. 1978. Surfactant effects on pesticide photochemistry in water and soil. EPA Report 600/3-78-060. U.S. Gov. Printing Office, Washington, DC.Google Scholar
10. Lykken, L. 1972. Role of photosensitizers in alteration of pesticide residues in sunlight. Pages 449–469 in Matsumura, F., Boush, G. M., and Misato, T., eds. Environmental Toxicology of Pesticides. Academic Press, New York.CrossRefGoogle Scholar
11. McWhorter, C. G. 1982. The use of adjuvants. Pages 10–25 in Hodgson, R. H., ed. Adjuvants for Herbicides. Weed Sci. Soc. Am., Champaign, IL.Google Scholar
12. Parochetti, J. V. and Dec, G. W. Jr. 1978. Photodecomposition of eleven dinitroaniline herbicides. Weed Sci. 26:153–156.Google Scholar
13. Steel, R.G.D. and Torrie, H. S. 1980. Principles and Procedures of Statistics–A Biomedical Approach. 2nd ed. McGraw-Hill Book Co., New York. Pages 258–261.Google Scholar
14. Tanaka, F. S., Wien, R. G., and Mansager, E. R. 1979. Effect of nonionic surfactants on the photochemistry of 3-(4-chlorophenyl)-1,1-dimethylurea in aqueous solution. J. Agric. Food Chem. 27:774–779.CrossRefGoogle Scholar
15. Tanaka, F. S., Wien, R. G., and Mansager, E. R. 1981. Survey for surfactant effects on the photodegradation of herbicides in aqueous media. J. Agric. Food Chem. 29:227–230.Google Scholar
16. Tanaka, F. S., Wien, R. G., and Hoffer, B. L. 1986. Photodegradation of a homogeneous nonionic surfactant: hexaethoxylated 2,6,8-trimethyl-4-nonanol. J. Agric. Food Chem. 34:547–551.CrossRefGoogle Scholar
17. Zepp, R. G. 1982. Experimental approaches to environmental photochemistry. Pages 19–41 in Hutzinger, O., ed. The Handbook of Environmental Photochemistry. Vol. 2. Reactions and Processes. Springer-Verlag, New York.Google Scholar
18. Zorner, P., Hazen, J., Evans, R., Gourd, D., and Fitzgerald, T. 1989. The influence of Dash adjuvant in limiting photodegradation of sethoxydim on leaf surfaces. Abstr. Weed Sci. Soc. Am. Page 83.Google Scholar