【摘要】 本研究以稻纵卷叶螟、稻纵卷叶螟绒茧蜂、化学农药系统为对象,应用最优控制理论与微机对该系统进行最优监控,以便合理使用农药控制虫口密度与天敌数量,既利用天敌在害虫防治中的积极作用,又维持系统处于害虫危害极徽的平衡水平;并且在监控的整个过程中使害虫对农作物的损失与防治费用总和达到最小。监控手段是使用一般微机。将设计好的监控程序输入微机,种植者只需将当前田间观测的虫口密度与天敌数量输入微机,微机即能迅速作出判断,并打印出“需要立即防治”,“不需要防治”或“×天后防治,防治时虫口密度=×××,天敌密度=×××”等信息。更多还原

【Abstract】 The authors applied optimal control theory and microcomputer technology to optimal monitoring of the Cnaphalocrocis medinalis Guen’ee—Apantetes cypris Nixon—insecticide systems and sufficiently considering the positive role of natural enemies in pest management. Our target is desirable to drive the state of the systems quickly to a level of equilibrium, which is usually lower than the economic threshold. A criterion to measure the performance of the new IPM program is to minimize the total cost of pest damage to crops and the expense of chemical, moreover, to bring the effect of natural enemies into the full play and avoid being eliminated by the pesticides. As operating this designed software for monitoring, growers will only have to input the current measurement of pest and predator population densities into computer. It will calculate, output the judgment at once,and print out the informations, such as "Need treatment immediately"; "Need no treatment"; "Need treatment after×days, pest density=×××, predator density=×××".更多还原