黄杜鹃花提取物对甜菜夜蛾的生物活性  

Bioactivities of the extracts from Rhododendron molle flowers against beet armyworm \%Laphygma exigua\%

作　　者：钟国华[1] 胡美英[1] 翁群芳[1] 

机构地区：[1]华南农业大学昆虫毒理研究室,广州510642

出　　处：《西北农业大学学报》2000年第2期98-102,共5页Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)

基　　金：国家自然科学基金资助项目! ( 3 9870 4 40 );广东省自然科学基金资助项目! ( 970 0 2 6)

摘　　要：测定了闹羊花素 - ( Rhodjaponin- ,简称 R- )等黄杜鹃花提取物对甜菜夜蛾的生物活性。结果表明 ,在非选择性和选择性条件下 ,R- 对甜菜夜蛾 3龄幼虫拒食作用的 AFC50 分别是 30 .71和 7.30 mg·L- 1;乙酸乙酯 ( Et OAc)萃取物的 AFC50 分别是 80 8.82和 650 .43mg· L- 1,拒食活性显著高于其他粗提物。连续饲喂 48h后 ,至第 5天 ,R- 和Et OAc萃取物对试虫的生长抑制中质量浓度 ( IC50 )分别是 1 3.1 1和 1 1 53.48mg·L- 1。Preliminary studies on the bioactivities of the extracts from Rhododendron molle flowers against beet armyworm Laphygma exigua were conducted.The values of medium antifeeding concentration (AFC 50 ) of R Ⅲ and ethyl acetate (EtOAc) extract against 3 rd larvae of L.exigua were 30.71 and 808.82 mg·L -1 in no choice tests,and were 7.30 and 650.43 mg·L -1 in choice tests,respectively.Given the treated diet with R Ⅲ and EtOAc extract for 48 h to larvae and after 5 days treatment,the values of IC 50 (the medium inhibitory concentration) were 13.11 and 1 153.78 mg·L -1 ,resp.

关 键 词：黄杜鹃花 闹羊花素-Ⅲ 甜菜夜蛾 生物活性 杀虫剂 

分 类 号：S482.39[农业科学—农药学] S433.4[农业科学—植物保护]