Effect of cassia senna L. seed kernel extract on pieris brassicae L. larvae
2003
Osman, M.Z. (Al-Zaeem Al-Azhari University, Khartoum (Sudan). Faculty of Agriculture)Hamid, M.E. (University of Khartoum, Shambat (Sudan). Faculty of Veterinary Medicine, Dept. of Preventive Medicine and Public Health, Shambat (Sudan))Selman, B.J. (University of Newcastle, Newcastle upon Tyne (U.K.). Agriculture and Environmental Sciences Dept.)
Crude extract of Cassia senna was used to assay its effect on Pieris brassicae L. (Lepidoptera) larvae. The extract was divided into organic and aqueous layers. From the aqueous layer, two glycosylated compounds, A and B, were isolated and purified using thin-layer chromatography. Neither the organic, aqueous, compound A nor compound B showed significant antifeedant or repellent activities to the larvae of Pieris brassicae when fed cabbage leaves treated with residual film of the extracted senna compounds. High mortality and inhibition of development of the larvae were observed with both organic and aqueous layers, and the highest mortality and inhibition of development were shown by compound A with LD50 attained at 0.0425; dose concentration. This indicated a very high toxicity of this compound to the larvae of Pieris brassicae
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