Autor(es): Lee, Hoi-Seon

Resumo: Fungicidal, insecticidal, and mosquito larvicidal activities of piperidine alkaloids, pipernonaline and piperoctadecalidine, and isobutylamide alkaloids, pellitorine, guineensine, pipercide, and retrofractaminde A, derived from Piperaceae fruits were studied. Pipernonaline and piperoctadecalidine showed potent fungicidal activities against Puccinia recondita with 91 and 80% control values at 500 ppm. Against Phytophthora infestans, pipernonaline showed strong fungicidal activity with 91 and 80% control values at 1,000 and 500 ppm. LD50 values of pipernonaline and piperoctadecalidine against Plutella xylostella were 125 and 95.5 ppm, respectively, and that of piperoctadecalidine against Tetranychus urticae was 246 ppm. Against larvae of Aedes aegypti and Culex pipiens pallens, LD50 values of pipernonaline were 0.35 and 0.21 ppm, respectively. Highest larvicidal activities of pipercide and retrofractamide A were found against A. aegypti, A. togoi, and C pipiens pallens. LD50 values of pipercide and retrofractamide A were 0.10 and 0.039 ppm against A. aegypti, 0.26 and 0.01 ppm against A. togoi, and 0.004 and 0.028 ppm against C pipiens pallens, respectively. Based upon these results and earlier findings, bioactive components derived from Piperaceae fruits may he valuable for development of useful lead product of possibly safer fungicidal, insecticidal, and mosquito larvicidal agents.

Palavras-Chave: Fungicide; Insecticide; Larvicide; Pipernonaline; Piperoctadecalidine; Pellitorine; Guineensine; Pipercide; Retrofractaminde A; Piperaceae fruits

Imprenta: Agricultural Chemistry and Biotechnology, v. 48, n. 2, p. 65-74, 2005

Descritores: Aedes aegypti - Larvicide

Data de publicação: 2005

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