Screening and Characterization of a Bacteria Strain L0 for Degradation of Cypermethrin
TL;DR: Strain L0 is a high effect degradation bacterium should be used for a bioremediation process of the contaminated soils by insecticides and decrease the environmental pollution.
Abstract: After initial screening on enrichment media, with subsequent sequential isolation on minimal media containing the cypermethrin as sole C source, three degrading strains were isolated from cypermethrin polluted soil Gas chromatography was used to measure the rates of disappearance of the cypermethrin, the strain L0 was identified as Bacillius sp preliminarily The optimum growth conditions for the aerobic degradation of cypermethrin by L0 were 26°C, pH 7 The degrade rate of cypermethrin by L0 is more than 8754% above conditions after cultivated for 72 hours Strain L0 is a high effect degradation bacterium should be used for a bioremediation process of the contaminated soils by insecticides and decrease the environmental pollution
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TL;DR: Insecticide research, having passed through several Golden Ages, is now in a renaissance of integrating chemicals and biologicals for sustainable pest control with human safety.
Abstract: Insecticide research led to the first "complete" victories in combatting pests almost 50 years ago with the chlorinated hydrocarbons followed quickly by the organophosphates, methylcarbamates, and pyrethroids--all neuroactive chemicals. This Golden Age of Discovery was the source of most of our current insecticides. The challenge then became health and the environment, a Golden Age met with selective and degradable compounds. Next the focus shifted to resistance, novel biochemical targets, and new chemical approaches for pest control. The current Golden Age of Genetic Engineering has curtailed, but is unlikely to eliminate, chemical use on major crops. Insecticide research, having passed through several Golden Ages, is now in a renaissance of integrating chemicals and biologicals for sustainable pest control with human safety.
625 citations
TL;DR: Runoff from residential neighborhoods around Sacramento, California was monitored over the course of a year and found bifenthrin was the pyrethroid of greatest toxicological concern, with cypermethrin and cyfluthrin of secondary concern.
224 citations
01 Dec 2013
205 citations
"Screening and Characterization of a..." refers background in this paper
...Cypermethrin, as an important synthetic pyrethroid insecticide, account for approximately one quarter of the global insecticide market [1,2]...
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TL;DR: A bacterium capable of utilizing pyrethroid pesticide cypermethrin as sole source of carbon was isolated from soil and identified as a Micrococcus sp.
Abstract: A bacterium capable of utilizing pyrethroid pesticide cypermethrin as sole source of carbon was isolated from soil and identified as a Micrococcus sp. The organism also utilized fenvalerate, deltamethrin, perimethrin, 3-phenoxybenzoate, phenol, protocatechuate and catechol as growth substrates. The organism degraded cypermethrin by hydrolysis of ester linkage to yield 3-phenoxybenzoate, leading to loss of its insecticidal activity. 3-Phenoxybenzoate was further metabolized by diphenyl ether cleavage to yield protocatechuate and phenol as evidenced by isolation and identification of metabolites and enzyme activities in the cell-free extracts. Protocatechuate and phenol were oxidized by ortho-cleavage pathway. Thus, the organism was versatile in detoxification and complete mineralization of pyrethroid cypermethrin
176 citations
TL;DR: Serratia spp.
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