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小麦吸浆虫是我区小麦生产上的毁灭性害虫。五十年代,此虫曾在我区部分地区造成危害。由于各级领导重视并采取有效措施进行防治,到了六、七十年代则下降为次要害虫。八十年代以来,小麦吸浆虫再度在我区猖獗发生,给小麦生产带来严重威胁。因此,必须研究其原因,找出科学防治对策,为实现我区小麦稳产高产作出新贡献。一、发生特点1.老发生区面积扩大,密度增高1954年小麦吸浆虫在我区的永城,柘城、商邱等县的个别乡村发生,全区发生面积不足5万
Wheat Midge is a devastating pest on wheat production in my area. In the 1950s, this worm caused harm in parts of our region. As leaders at all levels attach importance to and take effective measures to prevent and control, by the sixties and seventies, they dropped to secondary pests. Since the eighties, wheat midge resurgence occurred once again in my area, to wheat production poses a serious threat. Therefore, it is necessary to study the causes, find out scientific prevention and control measures, and make new contributions to the steady and high yield of wheat in our district. First, the occurrence of characteristics 1. The old area of ?? the area expanded, increased density In 1954 wheat midge in Yongcheng, Tancheng, Shangqiu counties and other individual villages in our region, the region occurred less than 50,000