Toxicological and histopathological effects of hydramethylnon on Atta sexdens rubropilosa (Hymenoptera: Formicidae) workers

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dc.contributor.authorDecio, Pâmela [UNESP]
dc.contributor.authorSilva-Zacarin, Elaine C.M.
dc.contributor.authorBueno, Fabiana C. [UNESP]
dc.contributor.authorBueno, Odair C. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2014-05-27T11:28:18Z
dc.date.available2014-05-27T11:28:18Z
dc.date.issued2013-02-01
dc.description.abstractThe leaf-cut ants are important agricultural pest, because they can cause intense defoliation in plants and destroy large areas cultivated. Although there are several works for the control of these insects by examining the toxicity of natural chemical compounds on various species of ants, few are focused on analyses of morphological changes caused in the affected organs. The aim of this study was to evaluate the effects of hydramethylnon on Atta sexdens rubropilosa workers through toxicological bioassays and morphological analysis of the post-pharyngeal glands, midgut, and Malpighian tubules of these ants. Hydramethylnon dissolved either in acetone (HA) or in a mixture of acetone and soy oil (HAO) was added to the artificial diet at a concentration of 200 μg/mL. The workers fed daily with the diet containing hydramethylnon showed higher mortality than the controls, especially when HAO was used. Moreover, light and electron microscopy revealed morphological alterations in the midgut and Malpighian tubules of workers treated with HA, whereas alterations of the post-pharyngeal glands were observed in the HAO-treated group. These results indicated that the presence of soy oil provided an alternate route for the ingestion of the formicide's active ingredient and corroborated previous studies that suggested a role for the post-pharyngeal glands in lipid metabolism. Our findings suggest that the oil may carry hydramethylnon to the gland lumen, resulting in lower quantity of the active ingredient in the intestinal lumen and Malpighian tubules that explains the lower degree of morphological alterations in these structures in the workers treated with HAO. These results may provide insight into the toxicological effects of hydramethylnon on leaf-cutting ants and the use of vegetable oil as an adjuvant in baits to control ants. © 2012 Elsevier Ltd.en
dc.description.affiliationInstituto de Biociências Universidade Estadual Paulista (UNESP), Campus de Rio Claro, SP
dc.description.affiliationLaboratório de Biologia Estrutural e Funcional (LABEF) Universidade Federal de São Carlos (UFSCar) - Campus Sorocaba, SP
dc.description.affiliationUnespInstituto de Biociências Universidade Estadual Paulista (UNESP), Campus de Rio Claro, SP
dc.format.extent22-31
dc.identifierhttp://dx.doi.org/10.1016/j.micron.2012.10.008
dc.identifier.citationMicron, v. 45, p. 22-31.
dc.identifier.doi10.1016/j.micron.2012.10.008
dc.identifier.issn0968-4328
dc.identifier.scopus2-s2.0-84872500802
dc.identifier.urihttp://hdl.handle.net/11449/74477
dc.identifier.wosWOS:000314332700003
dc.language.isoeng
dc.relation.ispartofMicron
dc.relation.ispartofjcr1.728
dc.relation.ispartofsjr0,624
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectHydramethylnon
dc.subjectLipids
dc.subjectMalpighian tubules
dc.subjectMicroscopy
dc.subjectMidgut
dc.subjectPost-pharyngeal gland
dc.subjectActive ingredients
dc.subjectAgricultural pests
dc.subjectAlternate routes
dc.subjectAtta sexdens rubropilosa
dc.subjectFormicidae
dc.subjectIntestinal lumen
dc.subjectLeaf-cutting ants
dc.subjectLipid metabolisms
dc.subjectMorphological alteration
dc.subjectMorphological analysis
dc.subjectMorphological changes
dc.subjectSoy oil
dc.subjectToxicological effects
dc.subjectChemical compounds
dc.subjectDrying oils
dc.subjectElectron microscopy
dc.subjectMicroscopic examination
dc.subjectMorphology
dc.subjectNutrition
dc.subjectAcetone
dc.subjectpesticide
dc.subjectpyrimidinone derivative
dc.subjecttetrahydro 5,5 dimethyl 2(1h) pyrimidinone [3 [4 (trifluoromethyl)phenyl] 1 [2 [4 (trifluoromethyl)phenyl]vinyl]allylidene]hydrazone
dc.subjectanimal
dc.subjectanimal structures
dc.subjectcytochemistry
dc.subjectdrug effect
dc.subjecteating
dc.subjectelectron microscopy
dc.subjectHymenoptera
dc.subjectsurvival
dc.subjectultrastructure
dc.subjectAnimal Structures
dc.subjectAnimals
dc.subjectEating
dc.subjectHistocytochemistry
dc.subjectMicroscopy, Electron
dc.subjectPesticides
dc.subjectPyrimidinones
dc.subjectSurvival Analysis
dc.subjectAtta
dc.subjectGlycine max
dc.subjectHexapoda
dc.titleToxicological and histopathological effects of hydramethylnon on Atta sexdens rubropilosa (Hymenoptera: Formicidae) workersen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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