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二点委夜蛾是危害玉米的新害虫,在河北省辛集市一年发生四代,第二代幼虫是为害玉米的主害代。清除玉米苗周围的麦糠、麦秸等覆盖物,就可有效控制危害。也可用毒饵诱杀法进行防治。一代成虫蛾量很大时可用药剂防治成虫。第三、四代幼虫对玉米正常生长不产生影响,以四代老熟幼虫越冬,主要越冬场所是田间覆盖物多并不再耕翻的地块,如北瓜地、果园落叶下、轮沟道边杂草等。破坏越冬场所、恶化越冬环境,有利于长期控制二点委夜蛾的发生为害。田间幼虫发生数量与降水量有关,降水量过大不利于幼虫存活。
Two-point litura moth is a new pest endangering corn in Xinji City, Hebei Province, occurred four generations a year, the second generation of larvae is the main damage to corn on behalf of the generation. Clear maize seedlings around the wheat bran, straw and other coverings, you can effectively control the hazard. Can also be used bait trapping method to prevent and control. A large generation of adult moths can be used to control adult insects. The third and fourth generation larvae did not affect the normal growth of maize. Four generations of mature larvae overwintered. The main wintering sites were plots with more field cover and no longer tillage, such as bee orchard, deciduous orchards, Roadside weeds and so on. Destroy the overwintering places, worsen the winter environment, is conducive to the long-term control of the occurrence of two-night-stage moth damage. The number of field larvae is related to the amount of precipitation, and excessive precipitation is not conducive to the survival of larvae.