摘要
为寻求活性较高的新的杀虫植物,采用小叶碟添加法,室内测定了10种山茶科植物甲醇提取物对小菜蛾3龄幼虫的拒食活性。结果表明:10种山茶科植物甲醇提取物在10g/L浓度下,厚皮香、四川大头茶、短果石笔木、粗毛石笔木和米碎花48h拒食率均大于70%。其中,厚皮香甲醇提取物对小菜蛾3龄幼虫的拒食活性最高,为81.48%;其次是四川大头茶,为77.25%;短果石笔木、粗毛石笔木和米碎花分别为74.99%、70.52%和70.51%;其余5种植物甲醇提取物对小菜蛾3龄幼虫的拒食活性较低,拒食率均在60%以下。
The antifeedant activities of the methanol extracts of 10 plants against 3rd instar P.xylostella were determined by leaf-dipping method in laboratory in order to seek new insecticidal plants.The results showed that the methanol extracts from Terastrocmia gymnanthera,Gordonia acuminate,Tutcheria brachycarpa,Tutcheria hirta,Eurya chinensis had high antifeedant activity against 3rd instar P.xylostella.Their 48 h antifeedant rates were more than 70% when the concentration reached 10 g/L.The methanol extracts from T.gymnanthera had the highest antifeedant activity,the antifeedant rates of 48 h was 81.48%.Secondly,they were G.acuminate（77.25%）,T.brachycarpa（74.99%）,T.hirta（70.52%）,E.chinensis（70.51%）.The other five plants had low antifeedant activities,with the antifeedant rates being below 60%.
出处
《贵州农业科学》
CAS
北大核心
2013年第3期54-55,59,共3页
Guizhou Agricultural Sciences
基金
广西自然科学基金青年项目"利用木荷树皮研制无公害植物源农药"(2011GXNSFB018055)
关键词
植物提取物
拒食活性
小菜蛾
plant extract
antifeedant activities
Plutella xylostella
