马齿苋干粉提取物对棉蚜的毒杀和拒食活性  

Bioactivity of extracts from dried powder of Portulaca oleracea L. against Aphis gossypii

作　　者：苏茂文[1] 罗万春[1] 张俊燕[1] 陈召亮[1] 

机构地区：[1]山东农业大学植物保护学院,山东泰安271018

出　　处：《植物资源与环境学报》2005年第2期10-14,共5页Journal of Plant Resources and Environment

基　　金：国家自然科学基金资助项目(30270887)

摘　　要：采用9种极性不同的溶剂利用冷浸法从马齿苋(PortulacaoleraceaL.)干粉中制备提取物,测定了其对棉蚜(AphisgossypiiGlover)的毒杀和拒食活性。浸渍法实验结果表明,处理24h后,马齿苋甲醇提取物对棉蚜的毒杀活性最高,LC50为6.63mg·mL-1(以干粉计,下同);二氯甲烷提取物在质量浓度为100mg·mL-1时对棉蚜的拒食率最高,达83.03%。处理48h后,丙酮提取物对棉蚜的毒杀活性最高,LC50为1.88mg·mL-1;二氯甲烷提取物在质量浓度为100mg·mL-1时拒食率仍表现为最高,达83.97%。在质量浓度为25mg·mL-1时,以石油醚提取物的拒食率最高,处理24和48h对棉蚜的拒食率分别达到71.25%和81.20%。Dried powder of Portulaca oleracea L. were extracted by the dipping method with methanol, ethanol, acetone, ethyl acetate, ether, trichloromethane, dichloromethane, benzene and petroleum ether, and bioactivity of the extracts against Aphis gossypii Glover including contact toxicity and antifeeding toxicity were approached. The results indicated that the methanol extract showed the highest contact toxicity with 6.63 mg·mL -1 (dried powder) of LC_ 50 among the 9 different extracts and the dichloromethane extract had the highest antifeeding toxicity with antifeeding rate 83.03% at the quality concentration 100 mg·mL -1 (dried powder) in the extracts after 24 h. After 48 h, the contact toxicity of the acetone extract was the highest with LC_ 50 1.88 mg·mL -1 and the dichloromethane extract had the highest antifeeding toxicity with antifeeding rate 83.97% at the quality concentration 100 mg·mL -1. Under the concentration of 25 mg·mL -1, the antifeeding rate of the petroleum ether extract was the highest, reached to 71.25% and 81.20% after 24 and 48 h respectively. The sequence of bioassay results for both contact toxicity and antifeeding toxicity of the 9 extracts from P. oleracea were also arranged respectively.

关 键 词：拒食活性 马齿苋 棉蚜 干粉 质量浓度 石油醚提取物 毒杀活性 LC50 二氯甲烷 甲醇提取物 丙酮提取物 拒食率 浸渍法 

分 类 号：S482.39[农业科学—农药学] TQ569[农业科学—植物保护]