危害棉花生产的棉铃虫,在经历了十多年前的特大发生后,虽然采取各种措施在一段时间内得到了有效控制,但近些年的发生与危害又有所抬头。近两年来,棉花面积有所调减,而调减的面积,大多数种植了蔬菜、玉米、芝麻和花生等作物,大大增加了棉铃虫的寄主田和桥梁田,导致棉铃虫的发生更为复杂化,进一步加大了防治工作的难度,更加值得各产棉区引起高度重视。 The cotton bollworm that endangers cotton production has undergone effective control over various measures after over a decade ago. However, the occurrence and damage of the bollworm in recent years have risen again. In the past two years, the cotton area has been reduced, and the area reduced, most of the crops such as vegetables, corn, sesame and peanut planted, greatly increased the host and bridge fields of cotton bollworm, leading to more occurrence of cotton bollworm Complicated, to further increase the difficulty of prevention and control work, more worthy of the cotton producing area attach great importance.