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dc.contributor.authorBarros, Eduardo Moreira-
dc.contributor.authorRodrigues, Agna Rita dos Santos-
dc.contributor.authorBatista, Felipe Colares-
dc.contributor.authorMachado, Anderson Vinnicius de Arruda-
dc.contributor.authorTorres, Jorge Braz-
dc.date.accessioned2020-09-23T19:28:42Z-
dc.date.available2020-09-23T19:28:42Z-
dc.date.issued2019-10-21-
dc.identifier.citationBarros, Eduardo Moreira; Rodrigues, Agna Rita dos Santos; Batista, Felipe Colares; Machado, Anderson Vinnicius de Arruda; Torres, Jorge Braz. Susceptibility of boll weevil to ready-to-use insecticide mixtures. Arquivos do Instituto Biológico. v. 86, e1232018, 2019.pt_BR
dc.identifier.issn1808-1657pt_BR
dc.identifier.urihttp://repositoriobiologico.com.br//jspui/handle/123456789/403-
dc.description.abstractBoll weevil is the major cotton pest in Brazil, and insecticides are widely recommended against it. We determined the susceptibility of boll weevil to insecticides either in single or in mixture ready-to-use formulations, which are registered to spray cotton fields under the hypothesis that mixtures are more toxic to the target pest. Concentration-mortality curves were determined to adult species, simultaneously through dried residues and ingestion. Ten insecticide formulations were studied with five in mixture (lambda-cyhalothrin + thiamethoxam, lambda-cyhalothrin + chlorantraniliprole, thiamethoxam + chlorantraniliprole, and fenitrothion + esfenvalerate) and their five respective single formulations. Cotton leaf discs and cotyledons were dipped into insecticide dilutions prepared by diluting the commercial products into distilled water. Adult mortality was assessed 48 hours after caging adults on treated and untreated materials. The LC50s-concentrations varied from 0.004 to 0.114 g a.i./L, with a relative potency between single and mixture ones, varying from 1.37- to 29.59-fold. Furthermore, lambda-cyhalothrin and thiamethoxam in single formulation were the most toxic insecticides to boll weevil. Among insecticide mixtures, only lambda-cyhalothrin + chlorantraniliprole resulted in a synergic effect; whereas the remaining mixtures showed an antagonistic effect. Therefore, except for the mixture of lambda-cyhalothrin + chlorantraniliprole, the remaining mixtures did not enhance toxicity against the boll weevil and should be recommended only when aimed at different purposes.pt_BR
dc.language.isoen_USpt_BR
dc.subjectAnthonomus grandis grandispt_BR
dc.subjectInsecticide combination indexpt_BR
dc.subjectChemical controlpt_BR
dc.subjectBroad-spectrum insecticidept_BR
dc.titleSusceptibility of boll weevil to ready-to-use insecticide mixturespt_BR
dc.title.alternativeSuscetibilidade do bicudo-do-algodoeiro a misturas de inseticidas prontas para usopt_BR
dc.identifier.doi10.1590/1808-1657001232018pt_BR
dc.description.editoraInstituto Biológicopt_BR
dc.description.localdapublicacaoSão Paulopt_BR
dc.identifier.tipoAbertopt_BR
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