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在水稻品种抗性对褐稻虱种群的控制作用研究中,大多数材料是在实验种群的试验中获得的,本文应用控制指数分析方法把实验种群的试验结果与自然种群的重要作用因子组合起来,对水稻品种抗性对褐稻虱自然种群的作用进行综合评价,结果说明,品种抗性作用于若虫存活率,与天敌的作用起着相辅相成的作用;而品种抗性对成虫繁殖力的影响,与捕食性天敌引起的成虫非正常死亡的共同作用,对褐稻虱种群后代卵量起着重要的控制作用。分析结果进一步明确品种抗性在种群系统控制中的优点,并为作物品种抗虫性对害虫自然种群作用的评价提供参考。
In the study of the control effect of rice variety on the population of brown planthopper (BPH), most of the materials were obtained from the experimental population experiment. In this paper, the control index method was used to combine the experimental population results with those of natural populations , The comprehensive evaluation of the effect of rice variety resistance on the natural populations of the brown planthopper, the results showed that the variety resistance on the nymphal survival rate, play a complementary role with natural enemies; and the impact of variety resistance on adult fecundity , Together with the abnormal death of adults caused by predatory natural enemies, play an important role in controlling the amount of progeny of the brown planthopper population. The analysis results further clarified the advantages of variety resistance in population system control and provided reference for evaluating the effect of crop pest resistance on the natural population of pests.