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The cross-resistance spectrum in deltamethrin resistance strains of Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) Neotropical Entomology
LORINI,IRINEU; GALLEY,DAVID J..
In order to verify if there was cross-resistance in deltamethrin resistance strains of Rhyzopertha dominica (F.), experiments were carried out with three insecticides used in stored grain to control pests: permethrin (pyrethroid), pirimiphos-methyl and chlorpyrifos-methyl (organophosphates). Three strains from Brazil (BR4, BR6 and BR7) and one from United Kingdom (UK1) were tested. The strains BR4 and UK1 were susceptible and BR6 and BR7 were resistant to deltamethrin. Initially all strains were assessed in their susceptibility to deltamethrin insecticide. Then, after they were submitted to deltamethrin selection pressure throughout three generations, each strain was assessed with all other insecticides to determine the cross-resistance spectrum. Results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Stored grain pest; Permethrin; Pirimiphos-methyl; Chlorpyrifos-methyl.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000200018
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Comparative study on the biodegradation of chlorpyrifos-methyl by Bacillus megaterium CM-Z19 and Pseudomonas syringae CM-Z6 Anais da ABC (AABC)
ZHU,JIANGWEI; ZHAO,YAN; RUAN,HONGHUA.
Abstract: The strains CM-Z19 and CM-Z6, which are capable of highly degrading chlorpyrifos-methyl, were isolated from soil. They were identified as Bacillus megaterium CM-Z19 and Pseudomonas syringae CM-Z6, respectively, based on the 16S rRNA and an analysis of their morphological, physiological and biochemical characteristics. The strain CM-Z19 showed 92.6% degradation of chlorpyrifos-methyl (100 mg/L) within 5 days of incubation, and the strain CM-Z6 was 99.1% under the same conditions. In addition, the degradation characteristics of the two strains were compared and studied, and the results showed that the strain CM-Z19 had higher phosphoesterase activity and ability to degrade the organophosphorus pesticide than did the strain CM-Z6. However, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacillus megaterium; Pseudomonas syringae; Chlorpyrifos-methyl; 3; 5; 6-trichloro-2-pyridinol; Biodegradation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500624
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