chlorpyrifos

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a common organophosphate insecticide

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The trends for 16 representative chemicals (captan, dicofol, butachlor, dimethyl terephthalate, sodium L-ascorbate, octanoic acid, chlorpyrifos-methyl, oxadiazon, pioglitazone, farglitazar, troglitazone, thiram, fludioxonil, mercuric chloride, fluazinam, and tetramethrin) are shown in Figure 3.
Resistance to chlorpyrifos-methyl, pirimiphos- methyl, of Rhyzopertha dominica (Coleoptera: Bostrichidae).
There are literature reports for Chlorpyrifos-methyl (3 negative reports: (Vinggaard et al.
None of the strains showed resistance to chlorpyrifos-methyl, two strains showed resistance to synergized pyrethrins and one to pirimiphos- methyl (Halliday et al.
Biological monitoring of exposure to chlorpyrifos-methyl by assay of urinary alkylphosphates and 3,5,6-trichloro-2-pyridinol.
Control of lesser grain borer (Coleoptera: Bostrichidae) with chlorpyrifos-methyl, bioresmethrin, and resmethrin: effect of chlorpyrifos- methyl resistance and environmental degradation.
2004), does not differentiate among exposure to TCPy, chlorpyrifos, and chlorpyrifos-methyl.
In the present study we explored whether environmental exposures to 1-naphthol (1N), a metabolite of carbaryl and naphthalene, and 3,5,6trichloro-2-pyridinol (TCPY), a metabolite of chlorpyrifos and chlorpyrifos-methyl, are associated with decreased semen quality in humans.
For instance, the measurement of TCPY provides dose information specific to chlorpyrifos or chlorpyrifos-methyl.
Chlorpyrifos and chlorpyrifos-methyl have had wide use on fruits and vegetables and as treatments inside and outside homes, although many residential uses were recently restricted (18).
Depending on the chemical structure of the pesticide, various alkylphosphates can be detected (13,17): phosphorodithioates, such as azinphos-methyl, azinphos-ethyl, and dimethoate, give rise to -phosphates (DMP or DEP), -thiophosphates (DMTP or DETP), and -dithiophosphates (DEDTP or DEDTP); phosphorothioates such as chlorpyrifos, chlorpyrifos-methyl, fenitrothion, and omethoate give rise to -phosphates (DMP or DEP) and -thiophosphates (DMTP or DETP); and phosphates such as chlorfenvinphos, dichlorvos, and monocrotophos give rise to -phosphates (DMP or DEP).