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呼伦贝尔市是我国北方农牧区草地螟重要发生区域之一。以往的研究认为,草地螟在本地越冬极少,不会构成大发生虫源。2001～2003年对草地螟2代幼虫发生区的越冬基数调查结果显示,2001年、2002年呼伦贝尔市存在大面积、高密度的越冬区域,最高活虫茧密度达到100头/m2。说明本市已经成为我国北方草地螟的一个潜在越冬区域。在越冬基数高的年份,将直接构成松嫩平原农区草地螟大发生的虫源地。
Hulun Buir City is one of the important occurrence areas of the meadow moth in northern China. Past studies suggest that grass borers rarely overwinter in the local, will not constitute a large source of insects. From 2001 to 2003, the investigation on the overwintering base of the 2nd generation larvae of meadow flies showed that there were large area and high density overwintering areas in Hulunbeier in 2001 and 2002, and the highest live cocoon density reached 100 heads / m2. This shows that the city has become a potential overwintering area in northern China. In the year with a high winter number, it will directly constitute the source of the serious occurrence of meadow flies in the Songnen Plain.