玉米是我省的主要粮食作物之一,也是饲料、酿造、医药和食品工业的重要原料。我省常年种植面积约2500万亩。玉米钻心虫的危害是影响玉米稳产和高产的主要限制因素,由于该虫为害常年减产10％左右,估算全省每年损失玉米约7亿斤。过去,一些地方或忽略玉米害虫防治或在防治上又多以单一害虫为对象,且多偏重于化学农药,成本高,经济效益低,在多种害虫重叠发生时,用药次数过多,对生态环境、天敌及人 Corn is one of the main food crops in our province and also an important raw material for feed, brewing, medicine and food industries. The annual planting area in our province is about 25 million mu. The harm of corn borer is the main limiting factor that affects the steady and high yield of corn. Since the pest infestation is reduced by about 10% annually, it is estimated that the province will lose about 700 million kg of corn annually. In the past, some places neglected the control of corn pests or even treated more pests as single pests, with more emphasis on chemical pesticides. The cost was high and the economic benefits were low. When multiple insect pests overlapped, Environment, natural enemies and people