Insecticidal activities and active ingredients of Derris fordii var. lucida were studied for the first time. Insecticidal activities and action mode were determined by bioassay. The active ingredients were isolated from the roots by activity-directed fractionation with column chromatography, thin layer chromatography (TLC) and recrystallization, and identified predominantly on the basis of MS and NMR data. The results showed among methanol extracts from various parts of D. fordii var. lucida only that from ...