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利用高效性诱剂对二点委夜蛾各世代成虫进行田间监测,发现其广泛分布于小麦、玉米、甘薯、棉花、花生、豆类等作物田,以及蔬菜地、果园、杂草荒地等当地几乎所有生境,且数量众多,单诱芯单日诱蛾量最高达727头。相对食物而言,二点委夜蛾更倾向于选择遮蔽、阴凉的地块栖息,其生存繁衍与田间生态环境关系密切。目前,越冬代及1代成虫主要分布于小麦田,数量显著高于其他生境;2代成虫数量最多、分布最广泛,但以棉花、甘薯、早播豆类、花生田较多;3代成虫数量急剧降低,适生环境有所集中,以甘薯、玉米、花生、豆类田等为主。二点委夜蛾数量大,分布范围广,已经成为河北省中南部发生地区为害夏玉米的常发性主要害虫。
By using high-efficiency lures, we conducted field surveys on the adult worms of the second order stage and found that they are widely distributed in the fields of crops such as wheat, corn, sweet potato, cotton, peanut, beans and other vegetable fields, orchards, Almost all habitats, and a large number of single-induced single-day induced moths up to 727 head. Relative to food, the two members of the night-stage moths are more inclined to choose shaded, cool plots habitat, its survival and reproduction and the field of ecological environment are closely related. At present, the overwintering and 1st generation adults are mainly distributed in the wheat field, and their numbers are significantly higher than those in other habitats. The second generation of adults have the largest number and the most widespread distribution, but are more in cotton, sweet potato, early sowing beans and peanut fields. The number of sharp decline in the environment suitable for the concentration of sweet potato, corn, peanuts, beans and other mainly. Two large number of clubbing moths, a wide range of distribution, has become the central and southern Hebei Province, the occurrence of harmful summer maize perennial perennial.