Abstract
The decomposition of the amidinohydrazone-type insecticide Hydramethylnon (HMN) by soil fungi has been investigated. A simple spectrophotometric method was developed for the estimation of HMN in soil and fungal culture media. HMN was found to be degraded in soil with a half life of 14 to 25 days.
Degradation of HMN by the lignolytic fungus,Phanerochaete chrysosporium yielded two major breakdown products;p-(trifluoromethyl)-cinnamic acid (TFCA) andp-(trifluoromethyl)-benzoic acid (TFBA). TFCA was converted to TFBA which was subsequently metabolised via themeta-fission pathway. Fluoride release from HMN could not be detected.
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Abbreviations
- BzDAc:
-
benzene, dioxane, acetic acid (60: 36: 4)
- DCM:
-
dichloroethane
- DNPH:
-
2,4-dinitro-phenylhydrazine
- HMN:
-
Hydramethylnon
- TDAc:
-
toluene, dioxane, acetic acid (90: 30: 1)
- TFCA:
-
p-(trifluoromethyl)-cinnamic acid
- TFBA:
-
p-(trifluoromethyl)-benzoic acid
- TFP:
-
1,5-bis(trifluoro-p-tolyl)-1,4-pentadien-3-one
- VA:
-
veratryl alcohol
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Abernethy, G.A., Walker, J.R.L. Degradation of the insecticide Hydramethylnon byPhanerochaete chrysosporium . Biodegradation 4, 131–139 (1993). https://doi.org/10.1007/BF00702330
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DOI: https://doi.org/10.1007/BF00702330