Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/40331
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dc.creatorAlves, Dejane Santos-
dc.creatorFernandez, Pilar Canela Garcia-
dc.creatorMartin, Alejandro Martin-
dc.creatorBudia, Flor-
dc.creatorCarvalho, Geraldo Andrade-
dc.creatorZanetti, Ronald-
dc.creatorOliveira, Denilson Ferreira de-
dc.date.accessioned2020-04-24T13:23:57Z-
dc.date.available2020-04-24T13:23:57Z-
dc.date.issued2019-
dc.identifier.citationALVES, D. S. et al. Toxicity of alkaloid fractions from Psychotria spp. (Rubiaceae) against Atta Sexdens Forel, 1908 (Hymenoptera: formicidae). Cerne, Lavras, v. 25, n. 2, p. 255-262, 2019.pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/40331-
dc.description.abstractLeaf-cutting ants are the main pests in forest plantations. The most commonly used chemical control for the ants is toxic bait. However, the active ingredients in these baits have been restricted by forest certification organizations, justifying the search for new active compounds to control these insects. Thus, this work aimed to evaluate the formicidal activity of alkaloid fractions from the roots, stems, branches and leaves of Psychotria hastisepala and Psychotria leiocarpa (Rubiaceae) against Atta sexdens Forel, 1908 (Hymenoptera: Formicidae). The alkaloid fractions were obtained from the crude methanolic extracts of P. hastisepala and P. leiocarpa by the acid-base extraction method employing liquid-liquid partitions. The fractions, previously solubilized in propanone, were applied topically to the pronotum of worker ants. Bioassays were conducted in a completely randomized design, with six replicates of each treatment and 10 ants per replicate. Insect survival was assessed daily for 21 days. The median lethal time was estimated by Weibull models. The root fractions from P. hastisepala presented the highest toxicity, followed by those from the branches, stems and leaves. Among fractions from P. hastisepala roots, the most toxic were a fraction that apparently is rich in lipophilic compounds and nonbasic alkaloids and a fraction that is likely rich in quaternary benzophenanthridine alkaloids, protopine alkaloids and tertiary bases. Psychotria leiocarpa fractions were not toxic to this insect. Psychotria hastisepala is potentially useful for the development of new products for A. sexdens control.pt_BR
dc.languageen_USpt_BR
dc.publisherUniversidade Federal de Lavraspt_BR
dc.rightsAttribution 4.0 International*
dc.rightsacesso abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.sourceCernept_BR
dc.subjectAlkaloidspt_BR
dc.subjectBotanical insecticidept_BR
dc.subjectForest pestspt_BR
dc.subjectLeaf-cutting ants - Chemical controlpt_BR
dc.subjectAlcalóidespt_BR
dc.subjectInseticida botânicopt_BR
dc.subjectPragas florestaispt_BR
dc.subjectFormigas cortadeiras - Controle químicopt_BR
dc.titleToxicity of alkaloid fractions from Psychotria spp. (Rubiaceae) against Atta Sexdens Forel, 1908 (Hymenoptera: formicidae)pt_BR
dc.typeArtigopt_BR
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