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以三化螟ＴｒｙＰｏｒｙｚａｉｎｃｅｒｔｕｌａｓ（Ｗａｌｋｅｒ）种群动态模型和水稻产量损失预测模型为基础，根据水稻插值期、品种抗性、保护利用自然天敌和杀虫剂多次使用等控制措施以及它们的各种不同组合对该虫种群动态、水稻产量损失率和净收益的影响，以净收益最大为目标函数，研究三化螟种群的最优管理决策。其中，对昆虫种群动态模拟方法作了一点改进，它综合了前人所提出的种群动态模型的优点。建立的系统模型能够提供包括农业防治、生物防治和化学防治措施在内的。对三化螟种群实施有效管理的最优决策方案。
Based on the Walker population dynamics model and the rice yield loss prediction model of the rice stem borer, according to the control measures such as rice interpolation period, variety resistance, protection and utilization of natural enemies and repeated use of insecticides, and their various combinations The population dynamics, the yield loss rate and the net income of the pest population were studied. The objective function was to maximize the net income, and to study the optimal management decision of the population. Among them, the method of dynamic simulation of insect population is improved a little, which integrates the advantages of the previous population dynamics model. The established system model can provide, including agricultural control, biological control and chemical control measures. The optimal decision-making scheme for the effective management of the population of rice stem borer