论文部分内容阅读
根据各测报点、监测点对美国白蛾越冬蛹死亡率和虫口基数及成虫始见期的调查监测结果,结合全省去冬今春的气候情况,经综合分析,辽宁省林检局预测今年全省第一代美国白蛾呈轻度发生趋势,发生面积在160万亩左右,但全省中部及南部个别地区的个别地块仍有偏重发生的趋势。一、发生期预测进入4月份以来,全省气温波动幅度较大。异常的气候造成第一代美国白蛾的成虫始见期较去年滞后。据各测报点性诱和灯诱监测,今年第一代美国白蛾成虫始见期最早为4月23日,出现在沈阳市苏家屯区,较去年推迟11天。其它大部分地区于4月25日至5月3日始见成虫。成虫始见期大多数地区较
According to the surveying and monitoring results of the overwintering pupal mortality rate, the population number of insects and the initial period of adult adults of the American white moth at monitoring points, the climate conditions of the whole province to winter and spring are analyzed. After comprehensive analysis, the forest inspection bureau of Liaoning Province predicts that this year The first generation of American white moth in the province showed a slight trend with an area of about 160 mu. However, individual plots in the central and southern parts of the province still tend to favor the trend. First, the expected period of entry Into April, the province’s temperature fluctuations larger. Abnormal climate caused by the first generation of American White moth adult onset lag compared with last year. According to the reporting point lure and light lure induction monitoring, the first generation of adult white moth adults this year, the earliest date of April 23, appeared in Shenyang Sujiatun District, 11 days later than last postponed. Most other adults see adults from April 25 to May 3. Adult onset period in most areas more