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为了澄清二点委夜蛾发生危害与气象因素、田间生态环境的关系,2011~2013年利用虫情测报灯对二点委夜蛾成虫系统监测,在田间对其主害代幼虫发生为害系统调查,并结合当地气象资料进行了分析。结果表明,小麦收获至玉米被害期,高温不利于二点委夜蛾发生,持续时间越长、高温强度越大、出现时间越早、影响越大;降雨有利于二点委夜蛾生长发育,但是强降雨对其不利。综合黄淮海地区高温、干旱气候,小麦秸秆还田、玉米贴茬播种并灌溉造墒的适宜生态环境是造成二点委夜蛾群体积累和暴发为害的重要因素。田间调查中还发现,在二点委夜蛾为害期,田间湿度大,但不积水,有利于该虫在田间取食潮湿或腐烂的麦秸,而田间干旱时,麦秸干燥,幼虫难以取食,反而更趋于寻找玉米幼苗钻蛀,玉米被害更加严重。
In order to clarify the relationship between Occurrence and the ecological factors in the field and the ecological factors in the field, the monitoring system of the adults of the armyworm, Myzus persicae, from 2011 to 2013 was systematically investigated. , And combined with local weather data were analyzed. The results showed that the wheat harvested to the corn damage period, the high temperature is not conducive to the emergence of two members of the night-long moth occurrence, the longer the duration, the higher the temperature intensity, the appearance of the earlier, the greater the impact of rainfall is conducive to the growth and development of the two H. litura, But heavy rainfall is detrimental to it. Comprehensive Huang-Huai-Hai region high temperature, arid climate, wheat straw, field planting of corn stubble and irrigating the appropriate ecological environment is caused by the two members of the Nightworm population accumulation and outbreak of an important factor. In the field investigation, it was also found that in the stage of infestation by the vermifacial spider moth, the humidity in the field was high but the water was not accumulated, which was favorable for the insect to feed the wet or decayed wheat straw in the field. When the field was dry, the wheat straw was dry and the larvae were difficult to feed , But tend to look for corn borer moths, corn is more serious victims.