Antifeedant activity and acute and residual toxicity of alkaloids from Sophora flavescens (Leguminosae) against formosan subterranean termites (Isoptera: Rhinotermitidae)

Document Type

Article

Publication Date

6-1-2007

Abstract

Ku Shen, Sophora flavescens Aiton (Leguminosae), contains alkaloids that possess broad biological activities. This study showed that total matrines (a mixture of the alkaloids), and matrine and oxymatrine (two major alkaloids) had a strong antifeedant effect against Formosan subterranean termite, Captotermes formosanus Shiraki (Isoptera: Rhinotermitidae), at all tested concentrations (ranging from 0.01 to 5%). Total matrines and matrine also had significantly toxic effects at 5%. The estimated LD50 of total matrines and matrine was 12.3 and 8.6 μg per insect, respectively, after 24 h; 13.3 and 7.1 μg per insect after 48 h; and 10.1 and 4.8 μg per insect after 1 wk. The antifeedant and toxic properties of total matrines- and matrine-treated wood remained effective at least 12 mo after treatment under both light and dark storage conditions. These chemicals have great potential for commercial development as wood treatment agents. © 2007 Entomological Society of America.

Publication Source (Journal or Book title)

Journal of Economic Entomology

First Page

866

Last Page

870

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