作　　者： ; ; ; ;

机构地区： 贺州学院化学与生物工程系

出　　处： 《农药》 2010年第8期612-614,共3页

摘　　要： 采用活性追踪和化学分离相结合的方法对木荷树皮甲醇提取物中的活性成分进行分离,用石油醚、氯仿和正丁醇连续萃取,经生物活性测定,正丁醇萃取物的活性最大。木荷树皮正丁醇萃取物在2 g/L质量浓度下,对小菜蛾3龄幼虫24、48 h的拒食率分别为91.30%和92.44%,拒食中浓度(AFC50)分别为0.457 0、0.434 6 g/L;对菜青虫4龄幼虫,在1 g/L质量浓度下,24、48 h的拒食率分别为99.08%和96.44%,拒食中浓度(AFC50)分别为0.041 9、0.055 7 g/L。 Methanol extracts from barks of Schima superba Gardn.et Champ.（L.） were isolated by means of phytochemistry combined with bioassay.Methanol extracts were continuously extracted by petroleum ether chloroform and n-butanol,and the n-butanol extract possessed the highest activity,with the 24 and 48 h antifeedant rates against 3rd instar of Plutella xylostella（L.） being 91.30 and 92.44% at 2 g/L,respectively,and 24 and 48 h antifeedant median concentration（AFC50） 0.4570 and 0.4346 g/L.with the 24 and 48 h antifeedant rates against 4th instar of Pieries rapae（L.） being 99.08 and 96.44% at 1 g/L,respectively,and 24 and 48 h antifeedant median concentration（AFC50） 0.0419 and 0.0557 g/L.

关 键 词： 木荷 小菜蛾 菜青虫 拒食活性

领　　域： [农业科学] [农业科学]