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Populations of EPTC-Degrading Microorganisms in Soils by Accelerated Rates of EPTC Degradation

Published online by Cambridge University Press:  12 June 2017

Thomas B. Moorman
Thomas B. Moorman*
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Southern Weed Sci. Lab., Stoneville, MS 38776
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Abstract

Reduced effectiveness of carbamothioate (thiocarbamate) herbicides in certain soils has been attributed to rapid herbicide degradation by soil microorganisms. Studies were conducted to determine if greater populations of EPTC (S-ethyl dipropyl carbamothioate)-degrading microorganisms were responsible for increased rates of degradation observed following repeated applications of EPTC to a Grenada silt loam soil. EPTC-degrading microorganism populations, measured with a 14C-MPN (most-probable-number) technique, were not larger in soils with accelerated rates of EPTC degradation, and degrader populations did not increase after application of 6 mg EPTC/kg of soil. Degrader populations increased after application of 60 mg EPTC/kg of soil only in soil previously treated for 6 yr with EPTC. Increased rates of metabolism of EPTC were apparently responsible for the increased rates of degradation, rather than increased populations of degraders.

Keywords

Accelerated degradationadaptionherbicidessoil persistencecarbamothioates
Type
Soil, Air, and Water
Information
Weed Science , Volume 36 , Issue 1 , January 1988 , pp. 96 - 101
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

Literature Cited

1. Alexander, M. 1982. Most probable number method for microbial populations. Pages 815–820 in Page, A. L., Miller, R. H., and Keeney, D. R., eds. Methods of Soil Analysis, Part 2. Chemical and Microbiological Properties. Second ed. Am. Soc. Agron., Madison, WI.Google Scholar
2. Bartha, R. and Pramer, D. 1965. Features of a flask and method for measuring the persistence and biological effects of pesticides in soil. Soil Sci. 100:68–70.CrossRefGoogle Scholar
3. Burge, W. D. 1969. Populations of dalapon-decomposing bacteria in soil as influenced by additions of dalapon or other carbon sources. Appl. Microbiol. 17:545–550.Google Scholar
4. Casida, J. E., Gray, E. A., and Tilles, H. 1974. Thiocarbamate sulfoxides: potent, selective and biodegradable herbicides. Science 184:573–574.Google Scholar
5. Cullimore, D. R. 1981. The enumeration of 2,4-D degraders in Saskatchewan soils. Weed Sci. 29:440–443.Google Scholar
6. Fournier, J. C., Codaccioni, P., and Soulas, G. 1981. Soil adaption to 2,4-D degradation in relation to the application rates and the metabolic behavior of the degrading microflora. Chemosphere 10:977–984.CrossRefGoogle Scholar
7. Harvey, R. G., McNevin, G. R., Albright, J. W., and Kozak, M. E. 1986. Wild proso millet (Panicum miliaceum) control with thiocarbamate herbicides on previously treated soils. Weed Sci. 34: 773–780.Google Scholar
8. Imai, Y. and Kuwatsuka, S. 1986. The mode of metabolism of the herbicide molinate by four strains of microorganisms isolated from soil. J. Pestic. Sci. 11:111–117.Google Scholar
9. Karns, J. S., Duttagupta, S., and Chakrabarty, A. M. 1983. Regulation of 2,4,5-trichlorophenoxyacetic acid and chlorophenol metabolism in Pseudomonas capacia AC1100. Appl. Environ. Microbiol. 46:1182–1186.Google Scholar
10. Kaufman, D. D. 1967. Degradation of carbamate herbicides in soil. J. Agric. Food Chem. 15:582–591.CrossRefGoogle Scholar
11. Kaufman, D. D. and Blake, J. 1973. Microbial degradation of several acetamide, acylanilide, carbamate, toluidine and urea pesticides. Soil Biol. Biochem. 5:297–308.Google Scholar
12. Kilbane, J. J., Chatterjee, D. K., and Chakrabarty, A. M. 1983. Detoxification of 2,4,5-trichlorophenoxyacetic acid from contaminated soil by Pseudomonas cepacia . Appl. Environ. Microbiol. 45:1697–1700.Google Scholar
13. Kunc, F. and Rybarova, J. 1983. Effect of glucose on the amount of bacteria mineralizing 2,4-dichlorophenoxyacetic acid in soil. Folia Microbiol. 28:54–56.Google Scholar
14. Lee, A. 1984. EPTC (S-ethyl N,N-dipropylthiocarbamate)-degrading microorganisms isolated from a soil previously exposed to EPTC. Soil Biol. Biochem. 16:529–531.Google Scholar
15. Lee, A., Rahman, A., and Holland, P. T. 1984. Decomposition of the herbicide EPTC in soils with a history of previous EPTC applications. New Zealand J. Agric. Res. 27:201–206.Google Scholar
16. Lehmicke, L. G., Williams, R. T., and Crawford, R. G. 1979. 14C-Most-probable-number method for enumeration of active heterotrophic microorganisms in natural waters. Appl. Environ. Microbiol. 38:644–649.Google Scholar
17. MacRae, I. C. and Alexander, M. 1965. Microbial degradation of selected herbicides in soil. J. Agric. Food Chem. 13:72–76.Google Scholar
18. Obrigawitch, T., Roeth, F. W., Martin, A. R., and Wilson, R. G. 1982. Addition of R-33865 to EPTC for extended herbicide activity. Weed Sci. 30:417–442.CrossRefGoogle Scholar
19. Obrigawitch, T., Wilson, R. G., Martin, A. R., and Roeth, F. W. 1982. The influence of temperature, moisture, and prior EPTC application on the degradation of EPTC in soils. Weed Sci. 30:175–181.CrossRefGoogle Scholar
20. Ou, L. -T. 1984. 2,4-D degradation and 2,4-D degrading microorganisms in soils. Soil Sci. 137:100–107.Google Scholar
21. Pirt, S. J. 1975. Principles of Microbial Cell Cultivation. Halstead Press, London. Pages 67–71.Google Scholar
22. Rahman, A. and James, T. K. 1983. Decreased activity of EPTC + R-25788 following repeated use in some New Zealand soils. Weed Sci. 31:783–789.Google Scholar
23. Skipper, H. D., Murdock, E. C., Gooden, D. T., Zublena, J. P., and Amakiri, M. A. 1986. Enhanced herbicide biodegradation in South Carolina soils previously treated with butylate. Weed Sci. 34:558–563.Google Scholar
24. Smith, A. E. and Hayden, B. J. 1982. Comparison of the persistence of EPTC, metribuzin, and propanil in Saskatchewan field soils. Bull. Environ. Contam. Toxicol. 29:243–247.CrossRefGoogle ScholarPubMed
25. Soulas, G. 1982. Mathematical model for microbial degradation of pesticides in the soil. Soil Biol. Biochem. 14:107–115.Google Scholar
26. Torstensson, N.T.L., Stark, J., and Goransson, B. 1975. The effect of repeated applications of 2,4-D and MCPA on their breakdown in soil. Weed Res. 15:159–164.Google Scholar