Persistence and fate of deltamethrin sprayed on a pond

Maguire, R. James; Carey, John H.; Hart, James H.; Tkacz, Richard J.; Lee, Hing Biu

doi:10.1021/jf00088a074

Cited by 43 publications

(37 citation statements)

References 17 publications

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“…Deltamethrin's half-life was about 1 h Ž . in the subsurface layer Maguire et al, 1989 . The reported amount, however, might be misleading if deltamethrin is retained in the surface microlayer.…”

Section: Y1mentioning

confidence: 99%

“…No residues of deltamethrin or its degradation products were found 11 days Ž . post-spray Maguire et al, 1989 . The half-life of deltamethrin was about 5 min in the surface microlayer y1 Ž with 42 ng L remaining after 55 h less than 1% of .…”

Section: Y1mentioning

confidence: 99%

“…The half-life of deltamethrin was about 5 min in the surface microlayer y1 Ž with 42 ng L remaining after 55 h less than 1% of . the initial deposit; Maguire et al, 1989 .…”

Section: Y1mentioning

confidence: 99%

See 2 more Smart Citations

Canadian water quality guidelines for deltamethrin

Pawlisz

Busnarda

McLauchlin

et al. 1998

Environ. Toxicol. Water Qual.

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Section: Y1mentioning

confidence: 99%

Section: Y1mentioning

confidence: 99%

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Canadian water quality guidelines for deltamethrin

Pawlisz

Busnarda

McLauchlin

et al. 1998

Environ. Toxicol. Water Qual.

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“…Although many outdoor studies have been conducted using radio-labeled pyrethroids, detailed information on their environmental fate is usually difficult to obtain due to the extremely lower concentration of degradates, except for a few cases. [6][7][8] Furthermore, these field studies are usually conducted using a commercial formulation in accordance with good agricultural practice and any effect of ingredients of the formulation, such as surfactant, on the environmental profiles of pesticide can be evaluated. In order to obtain information on the degradation of pyrethroid in a water column or bottom sediment, a model water-sediment system under illumination is considered very useful.…”

Section: Introductionmentioning

confidence: 99%

Degradation of esfenvalerate in illuminated water-sediment system

2009

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The aerobic aquatic soil metabolism of esfenvalerate [(2S,aS)-a-cyano-3-phenoxybenzyl 2-(4-chlorophenyl)-3-methylbutyrate] was examined in two Japanese pond water-sediment systems in relation to the effects of illumination and formulation on degradation profiles. Esfenvalerate was rapidly partitioned from the water phase to the bottom sediments with dissipation half-lives of less than 1 day and either the application of formulation or illumination slightly accelerated the partition. The main degradate of esfenvalerate was 3-phenoxybenzoic acid via ester cleavage both under dark and light conditions. The epimerization at the a-cyanobenzyl carbon significantly proceeded to form the corresponding [2S,aR] isomer in both water and sediment. The possible degradate via photo-induced decarboxylation was scarcely detected in the water phase of the illuminated water-sediment systems.

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“…Similar profiles were also reported for deltamethrin (15) sprayed on ponds. 132,133) Residue analysis of chiral pesticides in soil and crops is then considered necessary to estimate the actual level of each enantiomer in their exposure assessment not only to wild species but also to humans, because each enantiomer may show different toxicological profiles. Reports on the change of an isomeric ratio for chiral pesticides in residue analysis are very limited in available literature, and reports on enantiomerization are rare.…”

Section: Enantiomerization In the Environmentmentioning

confidence: 99%

Isomerization of chiral pesticides in the environment

Katagi

2012

J. Pestic. Sci.

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The most biologically active stereoisomer(s) of a chiral pesticide should be used favorably when stereoisomers exhibit different activities on target species, not only to reduce the unnecessary burden of inactive ones to the environment but also to remove unjustified dietary and ecological risks as possible. However, the isomerization of a chiral pesticide, if it occurs in the environment, deteriorates the advantage of using chirally purified pesticide. The isomerization of a chiral pesticide should be examined in hydrolysis, photolysis, and metabolism in soil and plants to estimate enantioselectivity in its environmental fate and any ecotoxicological effects from the viewpoint of more precise risk assessment.

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Persistence and fate of deltamethrin sprayed on a pond

Cited by 43 publications

References 17 publications

Canadian water quality guidelines for deltamethrin

Canadian water quality guidelines for deltamethrin

Degradation of esfenvalerate in illuminated water-sediment system

Isomerization of chiral pesticides in the environment

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