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以往认为第一代二化螟的发生来源主要有4种:一是稻根,二是稻草,三是茭白,四是夏熟作物茎秆中。通过我区南丰、宜黄等县调查了解,二化螟越冬场所较为复杂,除上述四处越冬场所外,还有较多的二化螟潜伏在其它地方过冬。1979年4月11日,南丰县发现二化螟在田间腐朽松树中过冬之后,这个问题引起了我们的注意。1980年4月8日,我们在临川县东馆公社站上大队,发现杉木电线杆的朽木中,有不少二化螟潜伏在里面过冬。这根杉木电线杆过冬的二化螟,共计活虫22条,未见死虫。4月8日化蛹达11%。这根电线杆由于竖立在田
In the past that the first generation of stem borer occurs in four main sources: one is rice roots, the second is rice straw, strawberries are the third, summer straw stem. Through the investigation of Nanfeng and Yihuang districts in our district, it is known that the over-winged places of rice stem borers are more complicated. In addition to the above-mentioned four places of overwintering, there are still more stem-borers lurking in other places for the winter. April 11, 1979, Nanfeng County found that the stem borer in the field of decayed pine in the winter, the problem has aroused our attention. April 8, 1980, we Linchuan County East Hall commune station brigade, found in the deadwood of the cedar poles, there are many lodged in the lodging of the winter. This stem of the fir pole in the winter of the Chilo suppressalis, a total of 22 live worms, no dead insects. April 8 pupation up to 11%. This pole was erected in the field