Soil biodegradation and leaf transfer of insecticide imidacloprid applied in seed dressing in sugar beet crops

Rouchaud, Jean; Gustin, F.; Wauters, A.

doi:10.1007/bf00197224

Cited by 72 publications

(43 citation statements)

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“…In the present work, we also analyzed for the imidacloprid soil metabolites in the sugar beet trial made at Remicourt in 1992; we previously analyzed for imidacloprid (Rouchaud et al 1994). This sugar beet trial at Remicourt (clay 12%, silt 79%, sand 9%, silt) had been made in the same way as at Lubbeek, except the following.…”

Section: Methodsmentioning

confidence: 99%

“…14 CO 2 was the main product of 14 C-imidacloprid soil biodegradation. We previously studied the disappearance of imidacloprid in the soil of a sugar beet, organic fertilizers trial made at Lubbeek in 1992 (Rouchaud et al 1994). Also, in a sugar beet trial located at Remicourt, one part of the field had not been treated with organic fertilizers for 18 years, but its soil contained a high concentration (4.3%) of soil organic matter.…”

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confidence: 99%

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Imidacloprid Insecticide Soil Metabolism in Sugar Beet Field Crops

Rouchaud

Gustin

Wauters

1996

Bull. Environ. Contam. Toxicol.

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Imidacloprid (1-[(6-chloro-3-pyridinyl)methyl]-4,5-dihydro-N-nitro-1H-imidazol-2-amine, 1) is a new insecticide which is useful for the protection of sugar beet from soil insects (Atomaria, Blaniulus, Agriotes and Pegomya) and leaf insects (aphids). It is applied in pelleted seed dressing. It is a systemic compound which is absorbed by the plant. In the leaves, it gives a long lasting (3 to 4 months) protection against aphids and the virus yellows infections. The metabolism of 14 C-imidacloprid was investigated in plant cell suspension cultures (Koester 1992). The main metabolites corresponded to imidacloprid hydroxylation

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Imidacloprid Insecticide Soil Metabolism in Sugar Beet Field Crops

Rouchaud

Gustin

Wauters

1996

Bull. Environ. Contam. Toxicol.

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“…e residue of imidacloprid in the lysimeter soil pro le before harvesting in the study of Oi et al is unknown and a direct comparison cannot be made with the residue of imidacloprid in the MPL soil prole at 21 DAT in our study; 35) however, the average concentrations of imidacloprid in 5-15 cm were 13.6 and 8.8 μg/kg, respectively, with AS and BT treatment, which is comparable to the above nding of Oi et al (1994) considering the sampling depth and monitored time. 35) Meanwhile, in several studies under unsaturated soil conditions, imidacloprid was reported not to move into the deeper soil layers, if used correctly (i.e., at the recommended rate, without irrigation and heavy rainfall), 17,36,37) despite its relatively high water solubility. Column leaching studies found that the leaching of imidacloprid is typically low.…”

Section: Imidacloprid Fate and Transport In Paddy Soilmentioning

confidence: 99%

Behavior of nursery-box-applied imidacloprid in micro paddy lysimeter

et al. 2012

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A micro paddy lysimeter (MPL) was employed to monitor the behavior of nursery-box-applied imidacloprid granules in the rice paddy environment using two treatment methods, i.e. before transplanting (BT) and at sowing (AS). Tested application rates were three-fold the recommended rate. Under a water management scenario in an actual eld, the behavior of nursery-box-applied imidacloprid granules in paddy water and paddy soil in MPL was comparable with eld monitoring data in the literature. Imidacloprid concentration in water peaked at 189±36 μg/L and 13.1±1.4 μg/L at 1 day a er transplanting (DAT), and the halflives (DT 50 ) were 2.5 days, and 4.7 days for BT and AS treatments, respectively. In the soil pro le, the maximum concentration of imidacloprid at 21 DAT was 65.6±0.4 μg/kg and 39.7±4.9 μg/kg in the 0-2.5 cm layer in the inter-row zone for BT and AS treatments, respectively. Imidacloprid was found in the 12.5-15.0 cm layer at 3.2±0.7 μg/kg for BT treatment and 13.7±3.8 μg/kg for AS treatment, in the inter-row zone. In AS treatment, imidacloprid mainly stayed in the root zone (0-5 cm surface soil layer), and its concentration was 895±4 μg/kg at 21 DAT. MPL presented as a convenient and alternative tool to monitor the behavior of nursery-box-applied pesticide in the rice paddy environment.

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“…The metabolism of imidacloprid in soil has been reported in relation to its use in sugar beet. 3,4 Imidacloprid has been introduced to Chinese markets, replacing methamidophos and being widely used because of its high insecticidal eþectiveness and low mammalian toxicity. In this paper, the kinetics of imidacloprid hydrolysis at diþerent pH values and temperatures are described.…”

Section: Introductionmentioning

confidence: 99%