通过连续3年田间系统观察,明确了二点委夜蛾在山西运城1年发生4代。2代幼虫是为害夏玉米的主害代,为害盛期6月下旬至7月初。越冬代、1代、2代和3代成虫盛期分别为4月中、下旬,6月中、下旬,7月下旬和8月下旬至9月初。成虫21:00~23:00活动最盛。卵期3~5 d,孵化率72%左右。蛹期8~10 d。以老熟幼虫结茧在土缝中或以老熟幼虫在覆盖物下越冬。贴茬播种,田间地表小麦秸秆多的田块发生较重。6中、下旬及7月初的降雨量或田间湿度大对其发生为害有利。试验结果表明,性诱剂采用粘胶诱捕器诱蛾量显著高于蛾类通用型诱捕器和新型飞蛾诱捕器,其诱蛾监测成虫的发生动态与虫情测报灯基本一致。噻虫嗪、吡虫啉和氟虫腈种子包衣防治效果分别为56.7%、53.2%和51.9%。 Through 3 consecutive years of field system observation, it was clarified that the 2nd instar larvae occurred in Yuncheng, Shanxi Province for one year for 4 generations. 2 generation larvae are the main damage to the summer maize generation, damage peak late June to early July. Overwintering generation, 1 generation, 2 generation and 3 generation of the peak period were mid-April, late, mid-June, late July, late July and early August to early September. Adult 21: 00 ~ 23: 00 activities most Sheng. Egg stage 3 ~ 5 d, hatching rate of about 72%. Pupal 8 ~ 10 d. Cocoon mature larvae in the soil seam or to mature larvae overwinter under cover. Seeds stubble sowing, the field surface wheat straw more plots occurred heavier. 6 Mid-late and early July rainfall or field humidity is good for its occurrence. The results showed that the lures of sex attractants using viscose traps were significantly higher than those of moth common traps and new moth traps. The occurrence dynamics of adult moths were basically consistent with that of the insect detection lights. Thiamethoxam, imidacloprid and fipronil seed coating control effect were 56.7%, 53.2% and 51.9%.