Biodegradation of Pesticides 1982
DOI: 10.1007/978-1-4684-4088-1_4
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Microbial Degradation of Pesticides in Tropical Soils

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Cited by 13 publications
(3 citation statements)
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“…This study indicates that intensive use of the same pesticide may lead to more rapid buildup of an enriched population of very active pesticidedegrading microorganisms under hot and humid conditions of the tropical environment than would occur in a temperate environment. In a review of microbial pesticide degradation in tropical soils, Sethunathan and colleagues concluded that acceleration of microbial activities due to elevated temperatures was the major factor responsible for observations of increased degradation of pesticides under tropical rice paddy soil conditions (Sethunathan et al 1982). As a result of this faster dissipation, the exposure of aquatic organisms to toxic waterborne residues of pesticides is likely to be reduced in tropical waters, because most chemicals will last a shorter time than they usually last in rivers, lakes, and ponds of temperate countries (Anyanwu and Odeyemi 2002).…”
Section: Discussionmentioning
confidence: 97%
“…This study indicates that intensive use of the same pesticide may lead to more rapid buildup of an enriched population of very active pesticidedegrading microorganisms under hot and humid conditions of the tropical environment than would occur in a temperate environment. In a review of microbial pesticide degradation in tropical soils, Sethunathan and colleagues concluded that acceleration of microbial activities due to elevated temperatures was the major factor responsible for observations of increased degradation of pesticides under tropical rice paddy soil conditions (Sethunathan et al 1982). As a result of this faster dissipation, the exposure of aquatic organisms to toxic waterborne residues of pesticides is likely to be reduced in tropical waters, because most chemicals will last a shorter time than they usually last in rivers, lakes, and ponds of temperate countries (Anyanwu and Odeyemi 2002).…”
Section: Discussionmentioning
confidence: 97%
“…For many pesticides, degradation depends on the presence of a degrading population of soil microorganisms as well as the abundance and activity of the population, which are contingent on the soil and environmental characteristics. For example, in tropical regions the half-lives of various herbicides have been shown to decrease (compared to temperate), presumably due to enhanced microbial activity in the warm wet environment (Sethunathan et al, 1982). In the case of oxyfluorfen, however, the t 1/2 value was found to slightly increase in tropical soils (Sanchez-Bayo and Hyne, 2011).…”
Section: Leaching Riskmentioning
confidence: 98%
“…Entretanto, no caso de compostos persistentes, cuja degradação é muito lenta, a eficiência da biorrecuperação pode ser aumentada pela estimulação dos organismos presentes no local pelo controle das condições de crescimento, a saber: nutrientes, O 2 e umidade favoráveis a esses organismos (Fabris et al, 1996). A adição de compostos orgânicos, por exemplo, pode estimular a atividade microbiana (Barriuso et al, 1997), resultar em aumento da biomassa microbiana (Lundquist et al, 1999) e acelerar a degradação de certos compostos (Sethunathan et al, 1982). O pH e a quantidade de O 2 do solo podem estabelecer condições que levem à seleção de microrganismos capazes de degradar compostos persistentes.…”
Section: Introductionunclassified