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二点委夜蛾是2011年在郑州市玉米田新发生的害虫。为明确二点委夜蛾在郑州市的发生规律,为其预测预报和综合防治提供科学依据,采用灯光诱捕法于2012—2014年连续3年进行了成虫发生期调查。综合3年诱蛾情况和其发育起点温度及有效积温,初步推断二点委夜蛾在郑州市每年发生4代,即越冬代成虫发生期4月上旬至5月下旬,1代成虫发生期在5月底至7月中旬,2代成虫发生期在7月中旬至8月中旬,3代成虫发生期在8月中旬至9月下旬。
Two members of the night-stage moth is a new pest in 2011 in Zhengzhou cornfield. In order to clarify the occurrence regularity of the two-stage phylloxera in Zhengzhou City and provide a scientific basis for its prediction and comprehensive control, the light trap method was used to investigate the occurrence of adult worms in 2012-2014 for three consecutive years. Based on the three-year-old induced moth and its developmental starting point temperature and effective accumulated temperature, it was preliminarily concluded that the occurrence of the second instar larvae occurred in the fourth generation in Zhengzhou City, that is, the overwintering adult occurred from early April to late May, From the end of May to the middle of July, the 2nd generation adults occur from mid July to mid August, and the 3rd generation adults occur from mid August to late September.