Studies of The Persistence of Some Carbamate Insecticides in The Aquatic Environment

Aly, Osman M.; El‐Dib, Mohamed

doi:10.1021/ba-1972-0111.ch011

Cited by 34 publications

(20 citation statements)

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“…Pond T4 had the longest tl/2 in the water column and the lowest pH and water temperature, which is consistent with earlier work demonstrating the important role that these variables play in the degradation of carbamate insecticides in water (Aly and E1-Dib, 1972;Chapman and Cole, 1982). Mean concentrations of carbofuran in submersed aquatic plants ranged from 0.08 to 0.44/~gg -1 16h after spraying.…”

Section: Fate and Persistencesupporting

confidence: 89%

“…The degradation of carbofuran and other carbamate insecticides have been shown to be log-linear functions of time (Aly and E1-Dib, 1972;Seiber et al, 1978;Gibbs et al, 1984). Assuming that degradation rates in the treatment ponds also followed a log-linear pattern over time, it was possible to estimate degradation rates for each pond despite the fact that they were sampled only twice following spraying.…”

Section: Fate and Persistencementioning

confidence: 99%

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Fate of carbofuran and its effects on aquatic macroinvertebrates in Canadian prairie parkland ponds

Wayland

Boag

1995

Ecotoxicology

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: A multipond study was conducted in 1986 to determine the fate of carbofuran and its effects on aquatic macroinvertebrates in alkaline, Canadian prairie parkland ponds. Four ponds were sprayed with carbofuran in late July; four other ponds served as controls. Sixteen hours after spraying, concentrations of carbofuran in the water column ranged from 9-32 μg l(-1). After 124 h, concentrations had declined to 3-12μg l(-1). Carbofuran partitioned into submersed aquatic plants, ranging from three to 46 times greater in the plants than in the surrounding water. Carbofuran was below detection limits in most sediment samples. Among the aquatic macroinvertebrates considered in this study, the crustacean Hyalella azteca and trichopteran larvae declined significantly in abundance following the application of carbofuran. Coenagrionidae and small chironomid larvae did not decline following carbofuran application. Hyalella azteca abundance remained relatively low in treatment ponds through to May 1987, while trichopteran larval abundance had recovered by August 1986. There were no readily apparent shifts in community structure in this study, although slight, disproportionate increases in Chironominae and Coenagrionidae in the treatment ponds following spraying may have resulted from such factors as reduced competition or a change in the size or composition of the food base.

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Section: Fate and Persistencesupporting

confidence: 89%

Section: Fate and Persistencementioning

confidence: 99%

Fate of carbofuran and its effects on aquatic macroinvertebrates in Canadian prairie parkland ponds

Wayland

Boag

1995

Ecotoxicology

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“…Carbamate insecticides waters of Northern Greece [76]. The major photoproduct observed from degradation of carbofuran was carbofuranAly and El-Dib [97] investigated the photodecomposiphenol, which further photodegraded. The major phototion of sevin (carbaryl) h1-naphthyl methylcarbamatej, product observed from degradation of carbaryl was abaygon (propoxur) h2-(1-methylethoxy)phenyl methylnaphthol.…”

Section: 3 Bipyridinium Herbicidesmentioning

confidence: 99%

Reaction pathways and mechanisms of photodegradation of pesticides

Burrows

Santaballa

Steenken

2002

Journal of Photochemistry and Photobiology B: Biology

563

286

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The photodegradation of pesticides is reviewed, with particular reference to the studies that describe the mechanisms of the processes involved, the nature of reactive intermediates and final products. Potential use of photochemical processes in advanced oxidation methods for water treatment is also discussed. Processes considered include direct photolysis leading to homolysis or heterolysis of the pesticide, photosensitized photodegradation by singlet oxygen and a variety of metal complexes, photolysis in heterogeneous media and degradation by reaction with intermediates generated by photolytic or radiolytic means.

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“…However, the metabolism of aldicarb to its sulfoxide is believed to be an activation reaction, since aldicarb sulfoxide is approximately 10-fold more potent as an anticholinesterase than aldicarb. Methylcarbamate insecticides are also highly susceptible to alkaline hydrolysis but are relatively stable to neutral or acidic conditions (27).…”

Section: Activation and Degradationmentioning

confidence: 99%

Mechanism of Action of Organophosphorus and Carbamate Insecticides

Fukuto¹

1990

Environmental Health Perspectives

205

255

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Organophosphorus and carbamate insecticides are toxic to insects and mammals by virtue of their ability to inactivate the enzyme acetylcholinesterase. This review addresses the mechanism of inhibition of acetylcholinesterase by organophosphorus and carbamate esters, focusing on structural requirements necessary for anticholinesterase activity. The inhibition of acetylcholinesterase by these compounds is discussed in terms of reactivity and steric effects. The role of metabolic activation or degradation in the overall intoxication process is also discussed.

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Studies of The Persistence of Some Carbamate Insecticides in The Aquatic Environment

Cited by 34 publications

References 0 publications

Fate of carbofuran and its effects on aquatic macroinvertebrates in Canadian prairie parkland ponds

Fate of carbofuran and its effects on aquatic macroinvertebrates in Canadian prairie parkland ponds

Reaction pathways and mechanisms of photodegradation of pesticides

Mechanism of Action of Organophosphorus and Carbamate Insecticides

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