粘虫是忻县专区禾本科作物的重要害虫之一,以麦类、谷子導作物受害最重。第一代一般发生在六月下旬至七月上旬,主要为害麦类,末期并转害秋作物。第二代发生于立秋前后,主要为害谷子等作物。据历年资料来看,二代仅在局部地区发生,不如一代为害重且普遍,所以该区应被认为是一、二代粘虫交错发生区,而以一代为主要。 Mythimna separata is one of the important pests of gramineous crops in Xin county area. The most serious victims are wheat and millet crops. The first generation generally occurs from late June to early July, mainly for wheat, and for the later stage and the transfer of autumn crops. The second generation occurred before and after the fall of autumn, the main damage to millet and other crops. According to historical data, the second generation only occurred in some areas, not as good as the generation of common and harmful, so the area should be considered as the first and second generation of armyworm staggered areas, and the generation as the main.