[Objective]The aim was to study on antifeedant activity of Polygonum hydropiper ethanol extract on corn leaf aphid under different conditions.[Method]Using single factor and orthogonal test,the antifeedant activity of Polygon um hydropiper ethanol extract on corn leaf aphid under different concentration, temperature and time was studied.[Result]The results showed that under concentration of 100.00 mg/mL,tem-perature 30 ℃and time 48 h,the antifeedant activity of Polygonum hydropiper ethanol extract was the highest.Extract concentration was the key factor influencing the antifeedant activity,followed by time factor.[Conclusion]The study provides theoretical basis for development of vegeta -ble insecticide with Polygonum hydropiper as raw material.%[目的]探究不同条件下辣蓼草乙醇提取物对玉米蚜的拒食活性.[方法]采用单因素试验和正交试验,研究不同浓度、温度和时间条件下辣蓼草提取物对玉米蚜的拒食率.[结果]提取物浓度为100.00 mg/mL、温度为30 ℃、时间为48 h时辣蓼草提取物对玉米蚜的拒食活性最高. 提取物浓度对辣蓼草拒食活性影响最大,其次为处理时间因素.[结论]该试验结果为开发以辣蓼草为原料的植物性杀虫剂提供了理论依据.
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