Liu Zhi Long, Chu Sha Sha, Jiang Guo Hua, Liu Shao Liang
Department of Entomology, China Agricultural University, Yuanmingyuan West Road, Haidian District, Beijing 100193, China.
Nat Prod Commun. 2012 Feb;7(2):171-2.
The screening for insecticidal principles from several Chinese medicinal herbs showed that the stem bark of Erythrina variegata var. orientalis possessed significant feeding deterrence against maize weevils, Sitophilus zeamais. Bioassay-directed fractionation of the stem bark extract of E. variegata var. orientalis resulted in the isolation of two alkaloids, identified as erysopine and erysovine from their spectroscopic data. Erysopine and erysovine possessed antifeedant activity against S. zeamais adults with EC50 values of 108.5 and 89.7 ppm, respectively.
对几种中药材的杀虫成分筛选表明，刺桐（Erythrina variegata var. orientalis）的茎皮对玉米象（Sitophilus zeamais）具有显著的取食抑制作用。对刺桐茎皮提取物进行生物活性导向的分离，从其光谱数据鉴定出两种生物碱，分别为刺桐平碱和刺桐文碱。刺桐平碱和刺桐文碱对玉米象成虫具有拒食活性，其EC50值分别为108.5 ppm和89.7 ppm。
