Degradation of the herbicide diclofopmethyl in soil and influence of pesticide mixtures on its persistence.

Karanth, N. G. K. and Anderson, J. P. E. and Domsch, K. H. (1984) Degradation of the herbicide diclofopmethyl in soil and influence of pesticide mixtures on its persistence. Journal of Biosciences, 6 (6). pp. 829-837.

PDF J. Biosci., Vol. 6, Number 6, December 1984, pp. 829–837.pdf - Published Version Restricted to Registered users only Download (246kB) | Request a copy

Abstract

The degradation of the herbicide [14C]-diclofopmethyl was investigated in moist parabrown podzol soil at 22°C. Radiochemical procedures were used to monitor the herbicide breakdown. The mineralization of the uniformly labelled aromatic ring was pursued by trapping the 14CO2 generated for 96 days. Diclofop-methyl was rapidly degraded in the soil with a half-life of about 8 days. The major breakdown product was the corresponding aciddiclofop, formed by a very rapid hydrolysis of the esterbond. With time the acid appeared to undergo strong binding or complexing to the soil. An intermediate 4-(2,4-dichlorophenoxy) phenol was recovered from the treated soil. Concentration of the phenoxyphenol increased upto 6 days followed by quick decline. Insecticide combination of parathion + Demeton-Smethylsulphoxide partially inhibited diclofop degradation in the soil.

Item Type:	Article
Uncontrolled Keywords:	Diclofop-methyl; herbicide; degradation; pesticide mixtures; soil
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry 500 Natural Sciences and Mathematics > 05 Earth Sciences > 02 Soil Sciences
Divisions:	Food Protectants and Infestation Control
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	14 Mar 2018 06:17
Last Modified:	14 Mar 2018 06:17
URI:	http://ir.cftri.res.in/id/eprint/3682

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