六种植物提取物对朱砂叶螨生物活性的影响

为了寻找理想的植物源杀螨活性物质,采用玻片浸渍法测定了鱼腥草(Houttuynia cordata Thunb)、使君子(Quisqualis indica L.)、辣蓼(Polygonum hydropiper L.)、喜树叶(Camptotheca acuminata Decne)、地榆(Sanguisorba officinalis Root)、陈皮(Citrus reticulata Blanco)的乙醇提取物对朱砂叶螨(Tetranychus cinnabarinus(Boisduval))的生物触杀活性。结果表明:6种植物的乙醇提取物在浓度为2mg·mL-1时24h后对朱砂叶螨的触杀死亡率依次达到52.33%、50.67%、42.00%、35.67%、23.00%和16.33%。进一步测定了鱼腥草的石油醚、氯仿、乙醇提取物对朱砂叶螨的生物触杀活性,结果表明:在浓度为2mg·mL-1时24h后触杀死亡率分别为:67.10%、56.83%和52.33%。研究为开发植物源杀螨剂提供了科学依据。

Studies on Acaricidal Bioactivities of Six Plants Extracts against the Tetranychus Cinnabarinus Bois.(Tetranychidae)

To develop the bioactive compounds against Tetranychus cinnabarinus（Boisduval）from plant,the contact activity of ethanol extracts from Houttuynia cordata Thunb,Quisqualis indica L.,Polygonum hydropiper L.,Camptotheca acuminata Decne,Sanguisorba officinalis Root and Citri reticulatae Blanco were tested against Tetranychus cinnabarinus（Boisduval）by slide-dip method.The results showed that after 24 h,the mortality of Tetranychus cinnabarinus（Boisduval）being treated with six extracts at the concentration of 2mg·mL-1 were 52.33%,50.67%,42.00%,35.67%,23.00%and 16.33%,respectively.Further,the contact activity of the petroleum ether,chloroform and ethanol parallel extracts from Houttuynia cordata Thunb were determined.When three extracts were applied to Tetranychus cinnabarinus（Boisduval）at the concentration of 2mg·mL-1,the death rates were 67.10%,56.83%and 52.33%after 24 h.So this study can provide scientific basis for the development of botanical acaricide.