湖南滨湖一带地区,当地水稻螟虫以大螟为主,它的为害远超过当地的二化螟和三化螟。笔者在工作中初步发现大螟的为害与二、三化螟不同,有两个主要特点:(1)幼虫多分布在田边为害。如1956年6月上、中旬在沅江西湖农业社调查田边1—3行水稻的600株枯心苗,共有螟虫100条,大螟占89%,二化螟 Hunan Lake area, the local rice stem borer to Sesamia inferens, its damage far more than the local Sesamia inferens and Borer. The author found in the work of the damage of Sesamia inferens and the second, three Borer different, there are two main features: (1) larvae more damage in the fields. As of June 1956, in mid and late June, 600 seedlings of rice in fields 1-3 of Tian Yuan were surveyed in Yuanjiang West Lake Agricultural Cooperatives. There were 100 stem borers, 89% of which borers borer, and Chilo suppressalis