Toxicity of Cymbopogon citratus Stapf. (Poaceae) against the diamondback moth, Plutella xylostella L. (Lepidoptera:Yponomeutidae) larvae
2008
Dadang, Bogor Univ. of Agriculture, Bogor (Indonesia) | Ohsawa, K., Tokyo Univ. of Agriculture, Tokyo (Japan). Dept. of Bio-Science
Cymbopogon citratus Stapf. has been reported to posses antifungal, nematocidal, acaricidal, and insecticidal activities. Active compounds that posses insecticidal activity to the diamondback moth, Plutella xylostella L. (Lepidoptera:Yponomeutidae) larvae have not yet been identified. Therefore, this study was conducted to evaluate the efficacy of the extract of C. citratus aerial parts and to elucidate the structure of the active compound causing larval mortality to P. xylostella. Bioassay-guided fractionation led to the isolation of the active compound as an essential oil, 3,7-dimelthyl-2,6-octadienal or citral. The LD50 value of this compound was 7.7 micro gram/insect by topical application.
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