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中文摘要：
农药复配制剂的研究对于延长新农药品种的使用寿命、缓解靶标生物的抗性、扩大防治谱、降低防治成本、提高药效和环境安全性等具有重要的意义。为筛选防治白背飞虱的农药增效复配配方,采用稻茎浸渍法测定了8种农药单剂及复配剂对白背飞虱3龄若虫的毒力。利用共毒因子法定性筛选出16组共毒因子大于20的配比,并对其中15组进一步利用共毒系数法定量筛选,得到有增效作用的5组配比,分别为烯啶虫胺与毒死蜱按1∶30配比以及吡虫啉与异丙威分别按7∶40、7∶200、7∶400和7∶1 000配比;其共毒系数分别为112.5、242.1、212.4、638.1、417.7,其中吡虫啉与异丙威按7∶400配比具有最显著增效作用。
英文摘要：
The study on combination of insecticides are of great significance to extend the application life of new pesticides, slow down the resistence of target-organisms, expand control spectrum, reduce the control costs, im- prove control efficacy and enhance the environmental safety. The toxicities of eight single insecticides and their different combination to the 3rd instar nymph of Sogatella furcifera were determined with rice stem-dipping meth- od under the laboratory condition. Sixteen mixtures with cotoxicity factor more than 20 were selected qualitatively by cotoxicity factor method. Among them five mixtures, including nitenpyram and chlorpyrifos with ratio of 1： 30, imidacloprid and isoprocarb with ratios of 7 ： 40, 7： 200, 7： 400 and 7 ： 1 000, respectively, showed higher co- toxicity coefficient of 112.5,242.1,212.4,638.1 and 417.7, respectively. Of which the mixture of imidacloprid and isoprocarb （7：400） showed the most significant synergism.
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