Bioactivity of compounds from Acmella oleracea against Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) and selectivity to two non‐target species

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorMoreno, Shaiene C.-
Autor(es): dc.creatorCarvalho, Geraldo A.-
Autor(es): dc.creatorPicanço, Marcelo C.-
Autor(es): dc.creatorMorais, Elisangela G. F.-
Autor(es): dc.creatorPereira, Rogério M.-
Data de aceite: dc.date.accessioned2026-02-09T11:48:29Z-
Data de disponibilização: dc.date.available2026-02-09T11:48:29Z-
Data de envio: dc.date.issued2019-11-26-
Data de envio: dc.date.issued2019-11-26-
Data de envio: dc.date.issued2011-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/37782-
Fonte completa do material: dc.identifierhttps://onlinelibrary.wiley.com/doi/10.1002/ps.2274-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1147902-
Descrição: dc.descriptionBACKGROUND: Tropical plants are recognised sources of bioactive compounds that can be used for pest control. The objective of this study was to evaluate the biological activity of compounds present in Acmella oleracea (Asteracea) against Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), which is the main pest of tomato crops in Latin America. The selectivity of these compounds to the predator Solenopsis saevissima (Smith) (Hymenoptera: Formicidae) and to the pollinator Tetragonisca angustula (Latr.) (Hymenoptera: Apidae: Meliponinae) was also of interest. RESULTS: A bioassay screening with hexane and ethanol extracts from 23 plants was performed. The hexane extract of A. oleraceae was the most active of the extracts and was selected for further study. The following three alkamides were isolated from a hexane extract of the aerial parts of A. oleracea: spilanthol, (E)‐N‐isobutylundeca‐2‐en‐8,10‐diynamide and (R, E)‐N‐(2‐methylbutyl)undeca‐2‐en‐8,10‐diynamide. All of the isolated compounds showed insecticidal activity, with spilanthol being the most active (LD50 = 0.13 µg mg−1) against T. absoluta. The alkamides were selective to both beneficial species studied. CONCLUSION: The crude hexane extract of A. oleraceae showed high insecticidal activity and can be used to control T. absoluta in organic or conventional crops. Quantification of LD50 values of isolated compounds against T. absoluta showed that alkamides could serve as potent insecticides for T. absoluta control programmes. Spilanthol was the main alkamide active isolated. This alkamide is the most promising as it has the highest insecticidal activity and is selective to non‐target organisms. Copyright © 2011 Society of Chemical Industry-
Idioma: dc.languageen-
Publicador: dc.publisherWiley-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourcePest Management Science-
Palavras-chave: dc.subjectSecondary metabolites-
Palavras-chave: dc.subjectBioactive alkamides-
Palavras-chave: dc.subjectTomato leafminer-
Palavras-chave: dc.subjectBotanical pesticide-
Palavras-chave: dc.subjectInsect control-
Título: dc.titleBioactivity of compounds from Acmella oleracea against Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) and selectivity to two non‐target species-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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