The mobility of thiobencarb and fipronil in two flooded rice-growing soils

Gregory Doran, Philip Eberbach, Stuart Helliwell

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Abstract

The mobility of the rice pesticides thiobencarb (S-[(4-chlorophenyl) methyl] diethylcarbamothioate) and fipronil ([5-amino-3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]pyrazole) were investigated in the glasshouse under flooded conditions using two Australian rice-growing soils. When using leakage rates of 10 mm day'1, less than 20% of applied thiobencarb and fipronil remained in the water column after 10 days due to rapid transfer to the soil phase. Up to 70% and 65% of the applied thiobencarb and fipronil, respectively, were recovered from the 0'1 cm layer of soils. Only 5'7% of each pesticide was recovered from the 1'2 cm layer, and less than 2% was recovered from each 1 cm layer in the 2'10 cm region of the soils. Analysis of the water leaking from the base of the soil cores showed between 5'10% of the applied thiobencarb and between 10'20% of the applied fipronil leaching from the soil cores. The high levels of pesticide in the effluent was attributed to preferential flow of pesticide-laden water via soil macropores resulting from the wetting and drying process, worm holes and root channels.
Original languageEnglish
Pages (from-to)490-497
Number of pages8
JournalJournal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes
Volume43
Issue number6
DOIs
Publication statusPublished - 2008

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thiobencarb
fipronil
Soil
Soils
rice
Pesticides
pesticides
soil
Water
root channels
pyrazoles
water analysis
preferential flow
macropores
flooded conditions
effluents
Oryza
benthiocarb
leaching
Leaching

Cite this

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title = "The mobility of thiobencarb and fipronil in two flooded rice-growing soils",
abstract = "The mobility of the rice pesticides thiobencarb (S-[(4-chlorophenyl) methyl] diethylcarbamothioate) and fipronil ([5-amino-3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]pyrazole) were investigated in the glasshouse under flooded conditions using two Australian rice-growing soils. When using leakage rates of 10 mm day'1, less than 20{\%} of applied thiobencarb and fipronil remained in the water column after 10 days due to rapid transfer to the soil phase. Up to 70{\%} and 65{\%} of the applied thiobencarb and fipronil, respectively, were recovered from the 0'1 cm layer of soils. Only 5'7{\%} of each pesticide was recovered from the 1'2 cm layer, and less than 2{\%} was recovered from each 1 cm layer in the 2'10 cm region of the soils. Analysis of the water leaking from the base of the soil cores showed between 5'10{\%} of the applied thiobencarb and between 10'20{\%} of the applied fipronil leaching from the soil cores. The high levels of pesticide in the effluent was attributed to preferential flow of pesticide-laden water via soil macropores resulting from the wetting and drying process, worm holes and root channels.",
keywords = "Open access version available, Anaerobic, Degradation, Diffusion, Flooded, Leaching, Sorption",
author = "Gregory Doran and Philip Eberbach and Stuart Helliwell",
note = "Imported on 12 Apr 2017 - DigiTool details were: Journal title (773t) = Journal of Environmental Science and Health. Part B: Pesticides, Food Contaminants, and Agricultural Wastes. ISSNs: 0360-1234;",
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T1 - The mobility of thiobencarb and fipronil in two flooded rice-growing soils

AU - Doran, Gregory

AU - Eberbach, Philip

AU - Helliwell, Stuart

N1 - Imported on 12 Apr 2017 - DigiTool details were: Journal title (773t) = Journal of Environmental Science and Health. Part B: Pesticides, Food Contaminants, and Agricultural Wastes. ISSNs: 0360-1234;

PY - 2008

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N2 - The mobility of the rice pesticides thiobencarb (S-[(4-chlorophenyl) methyl] diethylcarbamothioate) and fipronil ([5-amino-3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]pyrazole) were investigated in the glasshouse under flooded conditions using two Australian rice-growing soils. When using leakage rates of 10 mm day'1, less than 20% of applied thiobencarb and fipronil remained in the water column after 10 days due to rapid transfer to the soil phase. Up to 70% and 65% of the applied thiobencarb and fipronil, respectively, were recovered from the 0'1 cm layer of soils. Only 5'7% of each pesticide was recovered from the 1'2 cm layer, and less than 2% was recovered from each 1 cm layer in the 2'10 cm region of the soils. Analysis of the water leaking from the base of the soil cores showed between 5'10% of the applied thiobencarb and between 10'20% of the applied fipronil leaching from the soil cores. The high levels of pesticide in the effluent was attributed to preferential flow of pesticide-laden water via soil macropores resulting from the wetting and drying process, worm holes and root channels.

AB - The mobility of the rice pesticides thiobencarb (S-[(4-chlorophenyl) methyl] diethylcarbamothioate) and fipronil ([5-amino-3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]pyrazole) were investigated in the glasshouse under flooded conditions using two Australian rice-growing soils. When using leakage rates of 10 mm day'1, less than 20% of applied thiobencarb and fipronil remained in the water column after 10 days due to rapid transfer to the soil phase. Up to 70% and 65% of the applied thiobencarb and fipronil, respectively, were recovered from the 0'1 cm layer of soils. Only 5'7% of each pesticide was recovered from the 1'2 cm layer, and less than 2% was recovered from each 1 cm layer in the 2'10 cm region of the soils. Analysis of the water leaking from the base of the soil cores showed between 5'10% of the applied thiobencarb and between 10'20% of the applied fipronil leaching from the soil cores. The high levels of pesticide in the effluent was attributed to preferential flow of pesticide-laden water via soil macropores resulting from the wetting and drying process, worm holes and root channels.

KW - Open access version available

KW - Anaerobic

KW - Degradation

KW - Diffusion

KW - Flooded

KW - Leaching

KW - Sorption

U2 - 10.1080/03601230802174631

DO - 10.1080/03601230802174631

M3 - Article

VL - 43

SP - 490

EP - 497

JO - Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes

JF - Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes

SN - 0360-1234

IS - 6

ER -