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对3个米象的抗性品系（其中两个是国内的，一个为澳大利亚提供的）进行群体选择，对1个米象的敏感品系进行单对选择，对3个谷蠹的抗性虫种和1个敏感虫种也进行类似处理。用FAO方法测出3个抗性品系的米象中最高抗性品系的抗性倍数为198倍，但用FAO方法无法测出3个谷蠹的抗性倍数，因为谷蠹在高浓度测定中有晕迷现象。用替换了的FAO方法，即用固定了的对抗性虫低浓度0．5mg／1和对敏感虫的低浓度0．01mg／l进行不同时间的处理，用LCT50的方法得出抗性虫的抗性倍数：最高抗性谷蠹的抗性倍数为209，最高抗性米象的抗性倍数是193．7，非常接近于用FAO方法测出的为198的抗性倍数。
Three populations of resistant rice (two of which are domestic and one provided for Australia) were selected for group selection, one pair was selected for the susceptible strain of a rice plant, And a sensitive insects also conducted a similar treatment. The resistance ratio of the highest resistant line among the three resistant lines was 198-fold by the FAO method but not by the FAO method because the barnyard beetle was tested in a high concentration test Have fainted phenomenon. Using an alternative FAO method, treatment with immobilized antagonistic low concentrations of 0.5 mg / l and sensitive insects at low concentrations of 0.01 mg / l for different times, the LCT50 method was used to develop resistant pests Resistance fold: The highest fold resistance was 209, and the highest fold resistance was 193.7, much closer to the resistance multiple of 198 measured by the FAO method.