Effect of illumination on degradation of pyriproxyfen in water-sediment system

Kodaka, Rika; Swales, Sharon E.; Lewis, Christopher G.; Katagi, Toshiyuki

doi:10.1584/jpestics.g10-56

Cited by 20 publications

(18 citation statements)

References 15 publications

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“…Further, fast dissipation under UV-light indicate that UV-component of the sunlight will play a major role in the degradation of kresoxim-methyl under natural field conditions. Similar results of faster dissipation under light exposure were reported for the dissipation of pyriproxyfen (Kodaka et al 2011).…”

Section: Resultssupporting

confidence: 87%

Degradation of Kresoxim-Methyl in Water: Impact of Varying pH, Temperature, Light and Atmospheric CO2 Level

Khandelwal

Gupta

Gajbhiye

et al. 2015

Bull Environ Contam Toxicol

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In the present investigation, persistence of kresoxim-methyl (a broad spectrum strobilurin fungicide) was studied in water. Results revealed that kresoxim-methyl readily form acid metabolite. Therefore, residues of kresoxim-methyl were quantified on the basis of parent molecule alone and sum total of kresoxim-methyl and its acid metabolite. In water, influence of various abiotic factors like pH, temperature, light and atmospheric carbon dioxide level on dissipation of kresoxim-methyl was studied. The half life value for kresoxim-methyl and total residue varied from 1 to 26.1 and 6.1 to 94.0 days under different conditions. Statistical analysis revealed the significant effect of abiotic factors on the dissipation of kresoxim-methyl from water.

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Section: Resultssupporting

confidence: 87%

Degradation of Kresoxim-Methyl in Water: Impact of Varying pH, Temperature, Light and Atmospheric CO2 Level

Khandelwal

Gupta

Gajbhiye

et al. 2015

Bull Environ Contam Toxicol

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“…Influence of the matrix on bioavailability of pyriproxyfen residues in grapes and wine was studied by Payá et al Pyriproxyfen could also be dissipated in canned fruits and found in fish and water . Kodaka et al carried out the work on degradation of pyriproxyfen in a water‐sediment system …”

Section: Introductionmentioning

confidence: 99%

“…23 Kodaka et al carried out the work on degradation of pyriproxyfen in a water-sediment system. 24 Some other studies about the analysis and toxicity of pyriproxyfen were also carried out. The toxicity of pyriproxyfen to antennal morphology, Daphnia magna, Serangium japonicum.…”

Section: Introductionmentioning

confidence: 99%

Enantioselective dissipation of pyriproxyfen in soils and sand

2017

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Under normal conditions, the environmental behaviors of pesticides are affected by complex environmental factors and the manner of administration together with constraints. In order to meet the actual needs, we imitated the experiment and found that the degradation rate of pyriproxyfen in soils rendered complex changes. Rac-pyriproxyfen was successfully chiral separated on an AZ-H column and the residue analysis method was in accord with the demand of pesticide analysis. The results indicated that pyriproxyfen dissipated at a faster rate in Heilongjiang soil and Hainan soil, while at a much slower speed in another three soils and sand. Obvious enantioselective degradation was observed in Hainan soil and Qingdao sand. The results suggested that pyriproxyfen alone had low persistence in soil, but the moisture, soil type, the use of mixture formulation, and second spraying treatment could play important roles in dissipation of pyriproxyfen. Too large and too small moisture content could both make pyriproxyfen persist for a longer period in soil than in soil with 25% moisture content. Residues dissipated much slower after using Ai Qiu, while Shi Dingkang did not have a big effect on degradation, with only a small acceleration effect. Pyriproxyfen also dissipated in Hainan soil with difficulty after the second treatment.

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“…There is much research on the environmental behaviors of pyriproxyfen and over 10 metabolites have been identified in different matrixes such as soil, water, plants, insects, and mammals. Kodaka et al found 4‐(4‐(2‐(pyridin‐2‐yloxy)‐ propoxy)phenoxy)‐phenol (metabolite A ), 4‐(2‐(pyridin‐2‐yloxy)propoxy)‐phenol (metabolite B ), 3‐(pyridin‐2‐yloxy)butan‐1‐ol (metabolite E ), and 2‐(2‐pyridinyloxy)‐propanoic acid (metabolite F ) in water‐sediment systems . metabolite A and F were also generated with the degradation of pyriproxyfen in soil .…”

mentioning

confidence: 99%

“…Kodaka et al found 4-(4-(2-(pyridin-2-yloxy)-propoxy)phenoxy)-phenol (metabolite A), 4-(2-(pyridin-2-yloxy)propoxy)phenol (metabolite B), 3-(pyridin-2-yloxy)butan-1-ol (metabolite E), and 2-(2-pyridinyloxy)-propanoic acid (metabolite F) in water-sediment systems. 12 Metabolite A and F were also generated with the degradation of pyriproxyfen in soil. 13 Metabolite A, 1-(4-phenoxyphenoxy)-2-propanol (metabolite C), 4-(4-(2hydroxypropoxy) phenoxy)-phenol (metabolite D) were the major metabolites in the microsomes of housefly larvae.…”

mentioning

confidence: 99%

Enantiomeric Separations of Pyriproxyfen and its Six Chiral Metabolites by High‐Performance Liquid Chromatography

et al. 2016

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Pyriproxyfen is a chiral insecticide, and over 10 metabolites have been identified in the environment. In this work the separations of the enantiomers of pyriproxyfen and its six chiral metabolites were studied by high-performance liquid chromatography (HPLC). Both normal phase and reverse phase were applied using the chiral columns Chiralpak IA, Chiralpak IB, Chiralpak IC, Chiralcel OD, Chiralcel OD-RH, Chiralpak AY-H, Chiralpak AD-H, Chiracel OJ-H, (R,R)-Whelk-O 1, and Lux Cellulose-3. The effects of the chromatographic parameters such as mobile phase composition and temperature on the separations were investigated and the enantiomers were identified with an optical rotation detector. The enantiomers of these targets could obtain complete separations (resolution factor Rs > 1.5) on Chiralpak IA, Chiralpak IB, Chiralcel OD, Chiralpak AY-H, or Chiracel OJ-H under normal conditions. Chiralcel OJ-H showed the best chiral separation results with n-hexane as mobile phase and isopropanol (IPA) as modifier. The simultaneous enantiomeric separation of pyriproxyfen and four chiral metabolites was achieved on Chiralcel OJ-H under optimized condition: n-hexane/isopropanol = 80/20, 15°C, flow rate of 0.8 ml/min, and UV detection at 230 nm. The enantiomers of pyriproxyfen and the metabolites , , and obtained complete separations on Chiralpak IA, Chiralpak IC, and Lux Cellulose-3 under reverse phase using acetonitrile/water as the mobile phase. The retention factors (k) and selectivity factors (α) decreased with increasing temperature, and the separations were better under low temperature in most cases. The work is of significance for the investigation of the environmental behaviors of pyriproxyfen on an enantiomeric level.

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Effect of illumination on degradation of pyriproxyfen in water-sediment system

Cited by 20 publications

References 15 publications

Degradation of Kresoxim-Methyl in Water: Impact of Varying pH, Temperature, Light and Atmospheric CO2 Level

Degradation of Kresoxim-Methyl in Water: Impact of Varying pH, Temperature, Light and Atmospheric CO2 Level

Enantioselective dissipation of pyriproxyfen in soils and sand

Enantiomeric Separations of Pyriproxyfen and its Six Chiral Metabolites by High‐Performance Liquid Chromatography

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