泽漆乳浆及乙醇提取物对桃蚜的生物活性研究  

Insecticidal and antifeeding activity of latex and ethanol extracts of Euphorbia helioscopia Linn.against Myzus persicae

作　　者：程志平[1] 苏智先[2] 王劲[2] 代其林[2] 杨爽[1] 肖开煌[1] 

机构地区：[1]西华师范大学环境科学与生物多样性保护省级重点实验室,南充637002 [2]绵阳师范学院生态研究中心,绵阳621000

出　　处：《植物保护》2007年第2期46-49,共4页Plant Protection

基　　金：国家自然科学基金(30370149);四川省科技攻关基金资助(03NG001-019)

摘　　要：使用浸渍法测定了泽漆乳浆及乙醇提取物对桃蚜的室内杀虫作用和拒食作用。结果表明其乳浆物浓度在9.77g/L对桃蚜24h后校正致死率为75.39%,48h后校正致死率为86.08%;其乙醇提取物浓度20g/L24h的校正致死率为60.29%,48h后桃蚜校正致死率为63.06%。通过对泽漆乳浆和乙醇提取物杀虫效果和拒食作用的回归分析,表明不同浓度泽漆乳浆与提取物的触杀作用和拒食作用呈线性关系,且在浓度较大时,乳浆对桃蚜的致死率高于提取物,表明乳浆中对蚜虫致死物质的含量高于乙醇提取物,泽漆中对桃蚜具有致死和拒食作用的物质可能主要存在其乳浆中。The insecticidal and antifeeding activity of latex and ethanol extracts of Euphorbia helioscopia L. was tested against Myzus persicae （Sulzer） by using soaking method. The results showed that the responses of the aphids tested varied according to the dose and exposure time. The latex of E. helioscopia caused 75. 39% and 86.08% mortality at 9.77 g/L 24 and 48 hours after treatment, respectively, while the ethanol extracts caused 60.29% and 63.06% mortality at 20 g/L 24 and 48 hours after treatment, respectively. Regression analysis revealed that the insecticidal and antifeeding activity linearly correlated with the concentration of latex and ethanol extracts. The insecticidal activity of the latex at higher concentration was stronger than that of ethanol extracts. It is tempting to speculate that the effective components of E. helioscopia against M. persicae in latex were more than other parts.

关 键 词：泽漆 提取物 桃蚜 触杀作用 拒食作用 

分 类 号：S482.39[农业科学—农药学]