Data/hora: 16/06/2024 07:48:01

Biblioteca(s): | Epagri-Sede.
Data corrente: | 06/10/2014
Data da última atualização: | 06/10/2014
Autoria: | SCAPINELLO, J.; OLIVEIRA, J. V.; RIBEIROS, M. L.; TOMAZELLI JÚNIOR, O.; CHIARADIA, L. A.; MAGRO, J. D.
Título: | Effects of supercritical CO2extracts of Melia azedarach L. on thecontrol of fall armyworm (Spodoptera frugiperda).
Ano de publicação: | 2014
Fonte/Imprenta: | The Journal of Supercritical Fluids, New York, v. 93, p. 20-26, 2014.
Idioma: | Português
Conteúdo: | tThis work reports the use of Melia azedarach L. extracts obtained from supercritical carbon dioxide extrac-tion (SC-CO2) as an insecticidal agent against fall armyworm (Spodoptera frugiperda). For this purpose,SC-CO2extractions were performed, varying the pressure (150?250 bar), temperature (313?333 K), sam-ple particle size and extraction time. Secondary metabolites from the classes of coumarins, sterols andterpenes were identified in the extracts, with the triterpene melianone being the major constituent. Forthe biological activity tests, diets were prepared with different SC-CO2extract concentrations (100, 500,1000 and 5000 mg/kg) and offered to S. frugiperda (Lepidoptera: Noctuidae). The results indicated thatmortality increased with increasing extract concentrations with 50% mortality (LC50) at a concentration of376.74 mg/kg and reaching 100% mortality at 5000 mg/kg. The inhibition of insect growth was observedat higher concentrations due to the antifeedant action of the extract. At the lowest extract concentra-tion (100 mg/kg), ingestion caused low pupal viability and adults presenting morphological deformities,which thus indicated a chronic toxicity effect.
Palavras-Chave: | Bioinsecticide; Chinaberrya; SC-CO2extraction; Spodoptera frugiperda.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_34903.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (96941-1) - UPC - AP - DD -  -  -  - DIS