Kinetics of carbosulfan hydrolysis to carbofuran and the subsequent degradation of this last compound in irrigated rice fields

Plese, Luis Pedro de Melo; Paraíba, L. C.; Foloni, Luiz Lonardoni; Trevizan, Luiz Roberto Pimentel

doi:10.1016/j.chemosphere.2005.02.049

Cited by 56 publications

(27 citation statements)

References 24 publications

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“…In comparison, cadusafos was most persistent in soil even after the seventh application. Carbosulfan and carbofuran were reported to have low persistence in water and moderate persistence in soil solution (Nigg et al, 1984;Meher et al, 1985;de Melo Plese et al, 2005), whereas cadusafos and triazophos were more persistent in water and soil (beyond 90 days in soil) (Meher & Agnihotri, 1990;Sunita Rani et al, 2001;Meher et al, 2005;Li et al, 2008). We found cadusafos to be most persistent in soil, followed by triazophos and carbosulfan.…”

Section: Discussionmentioning

confidence: 49%

Nematicidal efficacy, enhanced degradation and cross adaptation of carbosulfan, cadusafos and triazophos under tropical conditions

Meher

Gajbhiye

Singh

et al. 2010

Nematol

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Nematicides need to be applied in each cropping season but repetitive applications can reduce their persistence and efficacy due to the unpredictable phenomena of enhanced biotransformation and cross adaptation. Experiments were conducted to ascertain the number of times the nematicides carbosulfan, cadusafos and triazophos can be applied effectively in the field. Incubation studies checked their degradation rates and cross adaptation and bioassays assessed their efficacy against Meloidogyne incognita infecting Solanum lycopersicum. Monitoring nematode populations at the middle of seven consecutive tomato crops following nematicidal treatments at a recommendable rate of 1.0 kg a.s. ha −1 revealed a linear decrease in efficacy with successive seasons. The chemicals remained effective up to the fourth application when 53-62% reduction of M. incognita in soil was still achievable, which decreased significantly to 14-33% by the seventh application. The nematicides were more effective against endoparasitic (M. incognita and Rotylenchulus reniformis) than ectoparasitic (Helicotylenchus dihystera, Hoplolaimus indicus and Tylenchorhynchus vulgaris) nematodes. Bioassays revealed 13-18% more invasions of second-stage juveniles of M. incognita into roots of tomato grown in soil pre-treated seven times with nematicide than in similar soil with no history of nematicide use; invasion and soil population were positively correlated. Root galling of field-grown tomato increased from the first to the seventh application. In bioassays, tomato root galling was greater in unsterilised field soil (1.4-2.1) than in similar soil/sterilised soil (1.0) compared with 2.4-2.9 in untreated control soil. The decrease in efficacy was attributable to accelerated microbial degradation of nematicides due to repeated use in each cropping season. Carbosulfan, cadusafos and triazophos exhibited a half-life (t 1/2 ) of 14, 20 and 27 days in soil with no history of nematicide use, whereas the t 1/2 was 6, 13 and 9 days in soil pre-treated seven times with nematicides and 28, 28 and 32 days in unsterilised soil, respectively. In cross adaptation studies, carbosulfan exhibited a t 1/2 of 7-9 days in soil pre-treated seven times with cadusafos and triazophos. The t 1/2 of cadusafos (22 days) was not affected in carbosulfan-treated soil but was affected (13 days) in triazophos-treated soil. Triazophos had a t 1/2 of 20 days in carbosulfan-treated soil and a t 1/2 of 8 days in cadusafos-treated soil. These results indicate that carbosulfan, cadusafos and triazophos can be applied effectively to the same field at least four times without decrease in efficacy due to accelerated biotransformation. Rotation of nematicide from different groups can be used in long-term nematode management strategies to avoid accelerated degradation and/or cross adaptation.

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Section: Discussionmentioning

confidence: 49%

Nematicidal efficacy, enhanced degradation and cross adaptation of carbosulfan, cadusafos and triazophos under tropical conditions

Meher

Gajbhiye

Singh

et al. 2010

Nematol

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“…In aquatic environments, carbosulfan can be hydrolyzed to carbofuran which is also a potent cholinesterase inhibitor. However, both chemicals have low persistence in water and medium persistence in soil solutions in tropical irrigated rice fields (De Melo Plese et al 2005). Based upon the stipulated acute toxicity criteria by USEPA (2004), carbosulfan could be considered as 'slightly toxic' to the tadpoles of D. melanostiscus as the 96 h-LC50 value of carbosulfan estimated in this study was 24 mg/L (Table 1) which is within the range of 10-100 mg/L.…”

Section: Discussionmentioning

confidence: 90%

Survival and cholinesterase activity of Asian common toad (Duttaphrynus melanostictus) tadpoles following short term exposure to a carbosulfan-based pesticide

Samarakoon

Pathiratne

2017

Sri Lanka J. Aquat.

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Carbosulfan, a carbamate pesticide widely used in agriculture especially in the Asian region has received less attention in ecological impact assessments particularly to non-target amphibians. In this study, short term effects of a carbosulfan-based pesticide (Marshal ® ) on survival and cholinesterase (ChE) activity of tadpoles of Duttaphrynus melanostictus, a non-target amphibian in tropical Asia were evaluated. Based on the concentration-toxicity response patterns, estimated median lethal concentration (LC50) and median ChE inhibitory concentration (IC50) for 96 h were 24 and 2.1 mg/L carbosulfan respectively. For the ChE inhibition for 96 h, the lowest observable effect concentration and no observable effect concentrations of carbosulfan were 0.6 and 0.3 mg/L respectively. Upon transfer to pesticide-free water by 14 days, ChE activities of the tadpoles were restored to normal levels. Since the tadpoles exposed to 0.3 mg/L carbosulfan have not exhibited lethality, morphological deformities, abnormal behavior or statistically significant ChE depression, it is unlikely that the carbosulfan-based pesticide could induce neurotoxic effects for D. melanostictus tadpoles at the concentration of ≤ 0.3 mg/L of active ingredient under short term exposure.

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“…Further, a few studies also focused on understanding the finer details of biodegradation process such as transcriptional regulation, kinetic behavior and structurefunction relation of enzyme involved in the processes etc. (Diaz and Prieto 2000;Tropel and van der Meer 2004;de Melo Plese et al 2005;Svedruzić et al 2005). With the advent of bioremediation technologies the importance of impact of the bioremediation process on the indigenous microbial community structure and monitoring the survival and activity of the augmented microorganism under natural conditions has been realized (Wenderoth et al 2003;Katsivela et al 2005;Paul et al 2006).…”

Section: Introductionmentioning

confidence: 98%

Biodegradation: gaining insight through proteomics

Chauhan

Jain

2010

Biodegradation

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Biodegradation, a generic term used to describe methodologies to affect cleanup of environmental pollutants, has come up as an improved substitute for ineffective and expensive physico-chemical remediation methods. However, lack of information about the factors controlling the growth and metabolism of microorganisms in the polluted environment often limits its implementation. Recent advances in the understanding of biogeochemical processes and genomics have opened up new perspectives towards new opportunities of pollution abatement. High throughput genomic techniques have revolutionized the remediation process leading to breakthroughs in characterizing proteomes, metabolomes and phenotypes for organisms, communities and populations. These new techniques have allowed us to address longstanding questions regarding the molecular mechanisms that may control the mineralization processes and have an in-depth understanding of microbial community structure and stress responses. In order to explore insights of biodegradation this article discusses ways in which proteomics may be able to meet challenges in biodegradation.

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Kinetics of carbosulfan hydrolysis to carbofuran and the subsequent degradation of this last compound in irrigated rice fields

Cited by 56 publications

References 24 publications

Nematicidal efficacy, enhanced degradation and cross adaptation of carbosulfan, cadusafos and triazophos under tropical conditions

Nematicidal efficacy, enhanced degradation and cross adaptation of carbosulfan, cadusafos and triazophos under tropical conditions

Survival and cholinesterase activity of Asian common toad (Duttaphrynus melanostictus) tadpoles following short term exposure to a carbosulfan-based pesticide

Biodegradation: gaining insight through proteomics

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