木荷提取物对小菜蛾和菜青虫的拒食活性  

Antifeedant Activities of the Extracts from Shima superba. et Champ. against Plutella xylostella and Pieries rapae

作　　者：邓志勇[1] 邓业成[1] 刘艳华[1] 

机构地区：[1]广西师范大学生命科学学院,广西桂林541004

出　　处：《农药》2007年第12期854-856,共3页Agrochemicals

基　　金：广西应用基础研究专项资助项目(桂科基0575048)

摘　　要：室内测定了木荷甲醇提取物对小菜蛾、菜青虫3龄幼虫的拒食活性。结果表明,木荷树皮甲醇提取物对小菜蛾、菜青虫3龄幼虫的拒食活性最高。木荷树皮甲醇提取物在10g/L的质量浓度下,对小菜蛾3龄幼虫24h和48h的拒食率分别为94.27%和94.78%,拒食中浓度(AFC50)分别为2.7445g/L和1.5519g/L;对菜青虫3龄幼虫,在2g/L的质量浓度下,24h和48h的拒食率均达到100%,拒食中浓度(AFC50)分别为0.1053g/L和0.1488g/L。The antifeedant activities of the methanol extracts from Shima superba Gardn. et Champ. against 3^rd instar Plutella xylostella L. and Pieries rapae L. were determined in laboratory. The results showed that the methanol extract from bark of Schima superba Gardn. et Champ. had the highest antifeedant activity. The 24 h and 48h antifeedant rates against 3^rd instar Plutella xylostella L. were 94.27% and 94.78% when the concentration reached 10g/L ,and 24 h and 48 h antifeedant median concentration（AFC50） was 2.7445 g/L and 1.5519 g/L. The 24 h and 48 h antifeedant rates against 3^rd instar Pieries rapae L.were 100.00% when the concentration reached 2 g/L, and 24 h and 48h antifeedant median concentration（AFC50） was 0.1053 g/L and 0.1488 g/L.

关 键 词：木荷 小菜蛾 菜青虫 拒食活性 

分 类 号：S482.39[农业科学—农药学]