The programmed model can be used for predicting the time and density of occurrence of ECB, the extent of damage and yield loss, and the expecting economics of control. Consequently, a reasonable management decision can thus be made

• 利用这个程序模型,能系统分析玉米螟第二代的发生期、发生量、为害程度和损失,以及预测防治的经济价值,从而作出合理的防治决策。