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Rate of Degradation of Metribuzin and Two Analogs in Soil

Published online by Cambridge University Press:  12 June 2017

D. L. Hyzak  and
R. L. Zimdahl
D. L. Hyzak
Affiliation:
Weed Res. Lab., Dep. of Bot. and Plant Path., Colorado State Univ., Fort Collins, CO 80521
R. L. Zimdahl
Affiliation:
Weed Res. Lab., Dep. of Bot. and Plant Path., Colorado State Univ., Fort Collins, CO 80521
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Abstract

The rates of degradation of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one], the isopropyl analog [4-ammo-6-isopropyl-3-(methylthio)-as-triazin-5(4H)-one], and the cyclohexyl analog [4-amino-6-cyclohexyl-3-(methylthio)-as-triazin-5(4H)-one] in soil were determined under laboratory and field conditions. First-order kinetics best described the rate of degradation of the three herbicides. At 5 and 20°C, metribuzin and the isopropyl analog degraded more slowly than the cyclohexyl analog. At 35°C, the rates of degradation for all three herbicides were similar. The calculated half lives were approximately 329, 44, and 16 days for the three herbicides at 5, 20, and 35°C, respectively. Rates of 1.12 and 2.24 kg/ha, applied in the field, remained in the upper 5 cm of the soil profile, and the pattern of herbicide degradation followed that found in the laboratory study at 20°C.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 1 , January 1974 , pp. 75 - 79
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

Literature Cited

1. Alexander, M. 1964. Biochemical ecology of soil microorganisms. Ann U. Rev. Microbiol. 18:217–252.CrossRefGoogle ScholarPubMed
2. Alexander, M. 1965. Persistence and biological reactions of pesticides in soils. Soil Sci. Soc. Amer. Proc. 29:1–7.Google Scholar
3. Audus, L.J. 1964. Herbicide behavior in soil. Pages 163–206 in Audus, L.J., ed. The physiology and biochemistry of herbicides, Academic Press, New York.Google Scholar
4. Burschel, P. 1961. Untersuchungen uber das verhalten von simazin im boden. Weed Res. 1:131–141.CrossRefGoogle Scholar
5. Burschel, P. and Freed, V.H. 1959. The decomposition of herbicides in soils. Weeds 7:157–161.CrossRefGoogle Scholar
6. Fleck, G.M. 1971. Chemical reaction mechanisms. Holt, Rhinehart and Winston, Inc. New York. 235 pp.Google Scholar
7. Grover, R. 1967. Studies on the degradation of 4-amino-3,5,6-trichloropicolinic acid in soil. Weed Res. 7:61–67.Google Scholar
8. Hamaker, J.W. 1966. Mathematical prediction of cumulative levels of pesticides in soil. Pages 121–131 in Gould, R.F., ed. Organic pesticides in the environment, Adv. Chem. Ser. 60, Amer. Chem. Soc., Washington, D.C. Google Scholar
9. Hamaker, J.W., Youngson, C.R., and Goring, C.A.I. 1968. Rate of detoxification of 4-amino-3,5,6-trichloropicolinic acid in soil. Weed. Res. 8:46–57.CrossRefGoogle Scholar
10. Hamaker, J.W. 1972. Decomposition: quantitative aspects. Pages 255–340 in Goring, C.A.I. and Hamaker, J. W., ed. Organic chemicals in the soil environment, Marcel Dekker, Inc., New York.Google Scholar
11. Hance, R.J. and McKone, C.E. 1971. Effect of concentration on the decomposition rates in soil of atrazine, linuron, and picloram. Pestic. Sci. 2:31–34.CrossRefGoogle Scholar
12. Hill, G.D., McGahen, J.W., Baker, H.M., Finnerty, D.W., and Bingeman, C.W. 1955. The fate of substituted urea herbicides in agricultural soils. Agron. J. 47:93–104.Google Scholar
13. Montgomery, M., Yu, Te C., and Freed, V.H. 1972. Kinetics of dichlobenil degradation in soil. Weed Res. 12:31–36.CrossRefGoogle Scholar
14. Riepma, P. 1962. Preliminary observations on the breakdown of 3-amino-1,2,4-triazole in soil. Weed Res. 2:41–50.CrossRefGoogle Scholar
15. Weber, J.B. 1970. Mechanisms of adsorption of s-triazines by clay colloids and factors affecting plant availability. Residue Rev. 32:93–127.Google Scholar
16. Zimdahl, R.L., Freed, V.H., Montgomery, M.L., and Furtick, W.R. 1970. The degradation of triazine and uracil herbicides in soil. Weed Res. 10:18–26.CrossRefGoogle Scholar