Decomposition and Leaching of Radioactive Sumithion in 4 Different Soils under Laboratory Conditions

Takimoto, Yoshiyuki; Hirota, Masataka; Inui, Hiroshi; Miyamoto, Junshi

doi:10.1584/jpestics.1.131

Cited by 25 publications

(17 citation statements)

References 7 publications

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“…This is assumed to be demethyl fenitrooxon since the Rf value found coincided with the value reported earlier by Takimoto et al (1976). Nothing is known of the identity of other unknowns; most were highly polar (Rf = 0) and may be amino acid or glucoside conjugates.…”

Section: Metabolic Fate Of Fenitrothionsupporting

confidence: 64%

“…Baker's Si-HPF-7011-4 chromatoplates coated with a sorbent layer (200 p m) containing a mixture of 5 ym SÍO2 and 254 nm fluorescent indicator were used. The solvent system was similar to that used by Takimoto et al (1976) and consisted of toluene:ethyl formate: formic acid in the ratio of 5:7:1 by volume. Known nonradioactive compounds (Table 1) (Sundaram et al 1987).…”

Section: Resolution Of Fenitrothion and Its Metabolitesmentioning

confidence: 99%

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Cuticular penetration and in vivo metabolism of fenitrothion in spruce budworm

Sundaram

1988

J. of Env. Sc. & Hlth., Part B

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Oil and emulsion formulations of 14 C-fenitrothion were applied topically to fifth instar budworm larvae. Cuticular penetration and metabolic breakdown of the chemical were studied over a period of 300 min using thin layer chromatography and liquid scintillation counting. Rates of penetration and depletion of the external residue over time were determined (recovered by washing the treated Insects with ethyl acetate). The quantity of fenitrothion penetrated was determined by macerating and extracting the tissues of washed insects with acetonitrile. Cuticular penetration of the chemical was higher for the oil than for the emulsion formulation.In addition to fenitrothion, demethyl fenitrothion, 643 644 SUNDARAM fenitrooxon, nitro-cresol and unidentifiable polar moieties were found in the insect washes and homogenates. Differences in amounts of the active material and its metabolites were found in the washes and homogenates depending on formulation type and rate of metabolism of the chemical over time. Demethylation of -OCH 3 group to -OH and P-O-aryl cleavage played major roles in the metabolic degradation of fenitrothion. The oxidation of P = S to P = 0 was apparent but the oxon levels were low and sporadic. No amino fenitrothion was found either in the insect washes or homogenates. Based on these findings, a tentative metabolic pathway of fenitrothion in budworm is proposed.

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Section: Metabolic Fate Of Fenitrothionsupporting

confidence: 64%

Section: Resolution Of Fenitrothion and Its Metabolitesmentioning

confidence: 99%

Cuticular penetration and in vivo metabolism of fenitrothion in spruce budworm

Sundaram

1988

J. of Env. Sc. & Hlth., Part B

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“…All of the identified metabolites have been also found in the metabolism studies of SMT in soil4,9) and by SMT-degrading microorganisms 4) PRT was metabolized by B-60 via cleavage of the P-O-aryl linkage or reduction of the nitro group followed by acetylation.…”

Section: Resultsmentioning

confidence: 83%

“…[3][4][5] 14C-PRT was purchased from NEN Research Products, and other 14C-preparations were synthesized in our laboratory.…”

Section: Methodsmentioning

confidence: 99%

Metabolism of Fenitrothion, Parathion and Cyanophos by Isolated Salithion-Degrading Bacteria from Soil

Itoh

1991

J. Pestic. Sci.

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“…After application, fenitrothion in the environment is transformed into various compounds by means of biological activity, chemical activity, and photolysis, and many researchers have investigated the resulting transformed products (TPs; Takimoto et al 1976;Spillner et al 1979;Adhya et al 1981;Mikami et al 1985a;Sato 1992;Shalini et al 1996;Alonso et al 1997;Hashizume et al 1997) and their proposed metabolic pathways.…”

Section: Introductionmentioning

confidence: 99%

Mutagenic fate of insecticide fenitrothion in the environment—mutagenicity increases both by anaerobic biodegradation and photodegradation

Matsushita

Matsui

Taniwaki

et al. 2008

Water Science and Technology

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In the present study, our objectives were (1) using the Ames assay, to evaluate the change in mutagenicity of a fenitrothion-containing solution during aerobic biodegradation, anaerobic biodegradation, and photodegradation, and (2) to identify possible mutagenic transformed products (TPs) that contributed substantially to any increase in mutagenicity. Mutagenicity of the fenitrothion-containing solution did not increase during aerobic biodegradation with any of the tested bacterial strains. In contrast, the mutagenicity increased for strain YG1029 during anaerobic biodegradation because of the generation of a strongly mutagenic TP, amino-fenitrothion. During photodegradation, mutagenicities increased slightly for YG1021 and YG1024, possibly owing to the production of a previously unreported mutagenic TP.

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Decomposition and Leaching of Radioactive Sumithion in 4 Different Soils under Laboratory Conditions

Cited by 25 publications

References 7 publications

Cuticular penetration and in vivo metabolism of fenitrothion in spruce budworm

Cuticular penetration and in vivo metabolism of fenitrothion in spruce budworm

Metabolism of Fenitrothion, Parathion and Cyanophos by Isolated Salithion-Degrading Bacteria from Soil

Mutagenic fate of insecticide fenitrothion in the environment—mutagenicity increases both by anaerobic biodegradation and photodegradation

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