+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Cuticular penetration and in vivo metabolism of fenitrothion in spruce budworm

Cuticular penetration and in vivo metabolism of fenitrothion in spruce budworm

Journal of Environmental Science & Health Part B Pesticides Food Contaminants & Agricultural Wastes 23(6): 643-659

Oil and emulsion formulations of 14C-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). 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, 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 -OCH3 group to -OH and P-O-aryl cleavage played major roles in the metabolic degradation of fenitrothion. The oxidation of P = S to P = O 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.

(PDF emailed within 0-6 h: $19.90)

Accession: 001790837

Download citation: RISBibTeXText

DOI: 10.1080/03601238809372631

Related references

Influence of adjuvants on cuticular penetration and metabolism of aminocarb following tropical application of Matacil 180F formulations to spruce budworm. Adjuvants for agrichemicals edited by Chester L Foy: 148, 1992

Persistence studies of insecticides: IV. Root penetration, translocation and metabolism of C-14 labelled fenitrothion in young Spruce trees. Information Report, Chemical Control Research Institute, Canada (CC-X-86): 15, 1975

Does fenitrothion spraying reduce parasitism of the spruce budworm?. Bi monthly Research Notes 27(3): 21, 1971

Monitoring of fenitrothion formulations used in the spruce budworm control program in New Brunswick. Report, National Research Council Canada: 37-49, 1977

Mode of entry of fenitrothion in the spruce budworm larvae choristoneura fumiferana from aerial spraying. Canadian Journal of Plant Science 65(3): 817-818, 1985

An assay of sequential application of fenitrothion and bacillus thuringiensis for an integrated control of the spruce budworm. Canadian Journal of Forest Research 8(3): 300-305, 1978

The effect of fenitrothion and aminocarb on second instar spruce budworm, Choristoneura fumiferana (Clem.) in Quebec. Report, Forest Pest Management Institute, Canada (FPM-X-5): 24, 1977

In vivo penetration and metabolism of methyl parathion in larvae of the tobacco budworm heliothis virescens f. fed different host plants. Pesticide Biochemistry and Physiology 33(1): 49-56, 1989

Fenitrothion residue survey in relation to the 1981 spruce budworm spray program in New Brunswick, Canada. Bulletin of Environmental Contamination and Toxicology 32(1): 65-74, 1984

In vivo fate of the insecticide Zectran in Spruce budworm, tobacco budworm and housefly larvae. Agricultural and Food Chemistry. 17: 1, 107-11, 1969