Dolui A K, Debnath M
Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh - 786 004, India.
J Environ Biol. 2010 Sep;31(5):557-9.
The different solvent extracts (viz Petroleum ether Ethyl acetate and Methanol) obtained from leaves and flowers of Heliotropium indicum and Spilanthes calva were screened for antifeedant activity against Helopeltis theivora. All the six different extracts showed antifeedant activity at four different concentrations. The methanolic extracts of leaves of Heliotropium indicum and Spilanthes calva exhibited significant activity at 4% concentration. The numbers of spots produced were only 18.67 and 22.67 respectively which are significantly less than the numberof spots produced in control (104.00 and 93.33 respectively). The treatment with methanolic extracts of flowers of both the plants significantly reduced the number of feeding spots to 22.33 and 23.67 respectively in comparison to the control values of 101.33. All the activities are dose dependent. The mean results with SEM (mean +/- SE) were statistically significant at 1% level (p<0.01) for three observations.
对从印度天芥菜（Heliotropium indicum）和刺毛黧豆（Spilanthes calva）的叶子和花朵中获得的不同溶剂提取物（即石油醚、乙酸乙酯和甲醇）进行了针对茶角盲蝽（Helopeltis theivora）的拒食活性筛选。所有六种不同提取物在四种不同浓度下均表现出拒食活性。印度天芥菜和刺毛黧豆叶子的甲醇提取物在4%浓度下表现出显著活性。产生的斑点数分别仅为18.67和22.67，明显少于对照中产生的斑点数（分别为104.00和93.33）。用两种植物花朵的甲醇提取物处理后，与对照值101.33相比，取食斑点数分别显著减少至22.33和23.67。所有活性均呈剂量依赖性。三次观察的带有标准误（均值+/-标准误）的平均结果在1%水平（p<0.01）上具有统计学意义。
