Fate and carryover properties of Temik aldicarb pesticide [2-methyl-2-(methylthio)propionaldehyde O-(methylcarbamoyl)oxime] in soil

Andrawes, Nathan R.; Bagley, William P.; Herrett, Richard A.

doi:10.1021/jf60176a024

Cited by 50 publications

(23 citation statements)

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“…Poor nematode control caused by an insufficient dispersion of aldicarb in the soil cannot be improved sufficiently by manipulation of the water supply. Andrawes et al (1971) have shown that on sandy loam rainfall of 3 cm or more at various times after application of aldicarb was associated with a considerable reduction in the total of labelled toxic residues of 14C aldicarb in the soil. The main constituents of this total were sulfoxide and sulfone for at least two months.…”

Section: Resultsmentioning

confidence: 98%

The effect of different ways of watering pots after the application of aldicarb on control of the potato cyst-nematode

Ouden¹

1977

Netherlands Journal of Plant Pathology

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Section: Resultsmentioning

confidence: 98%

The effect of different ways of watering pots after the application of aldicarb on control of the potato cyst-nematode

Ouden¹

1977

Netherlands Journal of Plant Pathology

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“…13 Their respective hydrolysis products, oximes and subsequent products, are much less toxic. 1 Assuming the degradation of the non-detected compound, the toxicity was reduced, representing an advantage of these systems. …”

Section: Methods Validationmentioning

confidence: 99%

“…It inhibits the action of acetylcholinesterase (AChE), which is an essential enzyme of a common metabolic pathway shared by insects and mammalians. 1 The high mobility of aldicarb and its residues (aldicarb sulfoxide and aldicarb sulfone) is due to their low sorption coefficients. In thin soil layer or under specific conditions (high water table, sandy soils, low pH, low temperature, high rainfall, irrigation practices etc.)…”

Section: Introductionmentioning

confidence: 99%

“…6 In the presence of microorganisms, aldicarb degradation occurs by two routes: oxidation to aldicarb sulfoxide and later to aldicarb sulfone (aerobic conditions); or hydrolysis of aldicarb and its residues to the corresponding oximes (anaerobic conditions). 1 Aldicarb and its oxidation products can be determined in terms of their nitrile derivatives by capillary gas chromatography with a nitrogen-phosphorus detector. 7 On the other hand, gas chromatographic procedures are difficult to perform due to several factors: (i) many of these compounds are thermally unstable, (ii) samples must be extracted and treated before analysis, and (iii) speciation of the residues requires an additional liquid chromatographic clean-up step.…”

Section: Introductionmentioning

confidence: 99%

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Development and validation of a HPLC method for the determination of aldicarb, aldicarb sulfoxide and aldicarb sulfone in liquid samples from anaerobic reactors

Damasceno¹,

Adorno²,

Hirasawa³

et al. 2008

J. Braz. Chem. Soc.

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Este trabalho descreve o desenvolvimento e validação de um método de detecção de aldicarbe e seus metabólitos por cromatografia líquida de alta eficiência (HPLC) em amostras líquidas sem pré-tratamento. O sistema HPLC foi equipado com coluna C-18 e fase móvel composta de água e acetonitrila empregando gradiente de eluição linear. O detector UV foi operado em 210 nm. Metomil foi utilizado como padrão interno. Água e meio sintético foram utilizados como solventes. O método foi linear de 0,49-15,0 mg L -1 (r 2 > 0,9985), 0,1-5,0 mg L -1 (r 2 > 0,9974) e 0,1-5,0 mg L -1 (r 2 > 0,9987) para o aldicarbe, sulfóxido de aldicarbe e sulfona de aldicarbe, respectivamente. A linearidade do método foi confirmada pelo teste F (ANOVA) através dos testes de ajuste do modelo linear, validade da regressão e eficiência da regressão. Os limites de detecção na água e em meio sintético foram de 0,391/0,440 mg L -1 , 0,069/0,192 mg L -1 e 0,033/0,068 mg L -1 para o aldicarbe, sulfóxido de aldicarbe e sulfona de aldicarbe, respectivamente. O tempo total de análise foi de 22 minutos. Na aplicação do método, avaliou-se a degradação do aldicarbe no reator anaeróbio horizontal de leito fixo (RAHLF) em diferentes condições operacionais (metanogênese, sulfetogênese e desnitrificação).This study describes the development and validation of a high-performance liquid chromatography (HPLC) method for detecting aldicarb and its residues in liquid samples without pretreatment. The HPLC system was equipped with a C-18 column and the mobile phase was composed of a mixture of water and acetonitrile using a linear gradient elution. The UV detector was utilized at 210 nm. Methomyl was used as an internal standard. Water and synthetic medium were used as solvents. The method was linear from 0.49-15.0 mg L -1 (r 2 > 0.9985), 0.1-5.0 mg L -1 (r 2 > 0.9974) and 0.1-5.0 mg L -1 (r 2 > 0.9987) for aldicarb, aldicarb sulfoxide and aldicarb sulfone, respectively. The linearity of the method was confirmed by the ANOVA F-test through adjustment of the linear model, validity of the regression and efficiency of the regression tests. The limit of detection in water and synthetic medium were of 0.391/0.440 mg L -1 , 0.069/0.192 mg L -1 and 0.033/0.068 mg L -1 for aldicarb, aldicarb sulfoxide and aldicarb sulfone, respectively. Total time of analysis was of 22 min. In the application of the method, the aldicarb degradation in horizontalflow anaerobic immobilized biomass (HAIB) reactor was evaluated under different conditions (methanogenic, sulfidogenic and denitrifying).

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“…Tais estudos revelaram que o aldicarbe é oxidado a sulfóxido e sulfona de aldicarbe, compostos tão tóxicos quanto o aldicarbe. Simultaneamente, ocorre a degradação do aldicarbe e seus produtos de oxidação, formando compostos não-carbamatos (oximas e nitrilas), que, por sua vez, são pouco tóxicos (Bull et al, 1970;Andrawes et al, 1971;Lightfoot et al, 1987). Estudos sobre a meia-vida de degradação do aldicarbe em solos mostraram uma considerável variação nos resultados, com valores de meiavida de 10 dias a 36 meses, de acordo com a classe de solo, profundidade, umidade, temperatura e pH Jones, 1987;Lightfoot et al, 1987;Barbosa & Rigitano, 1994).…”

Section: Introductionunclassified

Lixiviação de aldicarbe em macrolisímetros de dois Latossolos

Castro

Rigitano

Lima³

et al. 2005

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a lixiviação do inseticida aldicarbe em macrolisímetros contendo material indeformado dos solos Latossolo Vermelho distroférrico (LVdf) e Latossolo Vermelho-Amarelo distrófico (LVAd), em condições de campo. Uma formulação granulada de aldicarbe foi aplicada na dose recomendada, a 5 cm de profundidade, em lisímetros de 1,0 m de diâmetro e 0,45 e 0,90 m de profundidade, no início do período chuvoso. Nos cinco meses seguintes, o volume de água percolada nos lisímetros foi medido e amostras de água foram analisadas por cromatografia gás-líquido para a determinação da concentração de resíduos do composto. Os resíduos de aldicarbe e de seus produtos de oxidação ativos, sulfóxido e sulfona de aldicarbe, foram conjuntamente determinados na forma de sulfona de aldicarbe. Houve alta mobilidade dos resíduos de aldicarbe nos solos, porém, a intensa degradação desses resíduos resultou em sua lixiviação em quantidades relativamente baixas, a profundidades abaixo de 0,45 m (4,9% e 5,9% no LVdf e LVAd, respectivamente); na água percolada nos lisímetros de 0,90 m foram detectados resíduos apenas no LVdf. O risco de contaminação do lençol freático nos solos estudados, caracterizados como muito profundos, é mínimo.Termos para indexação: pesticida, contaminação, água do subsolo. Aldicarb leaching in macrolysimeters of two LatosolsAbstract -The objective of this work was to evaluate the leaching of aldicarb in macrolysimeters containing undisturbed soil material of a distroferric Red Latosol and of a distrofic Red Yellow Latosol, under field conditions. A granular formulation of the aldicarb pesticide was applied at the recommended rate, at 5 cm depth, in soil columns of 1.0 m diameter by 0.45 and 0.90 m long, at the beginning of the rainy season. The volume of percolated water in each lysimeter was measured during the subsequent five months, and water samples were analysed by gas-liquid chromatography for the determination of the pesticide residues concentration. Residues of aldicarb and its toxic transformation products, aldicarb sulfoxide and aldicarb sulfone, were jointly determined as aldicarbe sulfone. There was high mobility of aldicarb residues in soils, although their fairly rapid degradation in the soil resulted in the leaching of relatively low amounts below the depth of 0.45 m (4.9% for the distroferric Red Latosol and 5.9% for the distrofic Red Yellow Latosol). In 0.90 m lysimeters, aldicarb residues were detected only in the percolated water of the distroferric Red Latosol. Groundwater contamination risk in these soils, pointed out as too deep, is remote.

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Fate and carryover properties of Temik aldicarb pesticide [2-methyl-2-(methylthio)propionaldehyde O-(methylcarbamoyl)oxime] in soil

Cited by 50 publications

References 5 publications

The effect of different ways of watering pots after the application of aldicarb on control of the potato cyst-nematode

The effect of different ways of watering pots after the application of aldicarb on control of the potato cyst-nematode

Development and validation of a HPLC method for the determination of aldicarb, aldicarb sulfoxide and aldicarb sulfone in liquid samples from anaerobic reactors

Lixiviação de aldicarbe em macrolisímetros de dois Latossolos

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