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南丰县太和公社丹阳大队社员在田间劳动时,发现松木渡槽的朽木中有很多二化螟潜伏过冬,事后我们对这段渡槽进行检查,4月11日已查清在这段松树渡槽过冬的全部二化螟,共计活虫157只,死虫2只。4月11日化蛹达29.3％。这段渡槽长1丈零2寸、宽1.2尺,厚5.5寸,全渡槽含虫朽木体积总和约5立方寸,是一段含松油多、质地坚硬的松木渡槽。由于安放大田多年,部分含松油少、质地松软的地方已经腐朽霉烂,二化螟就蛀入其中过冬,密度很高。
During the work in the field, members of Danyang Brigade, Taihe Commune, Nanfeng County, found that many of the stem-borers in the pine-wood aqueduct lurked over the winter. Afterwards, we checked the aqueduct and on April 11 we had ascertained that during the winter, All stem borer, a total of 157 live insects, dead insects 2. On April 11 pupation reached 29.3%. This aqueduct is 1 inch and 2 inches long, 1.2 feet wide and 5.5 inches thick. The aqueduct contains about 5 cubic inches of dead wood and is a pine-wood aqueduct containing pine oil and hard texture. Due to the placement of the field for many years, part of the pine oil containing less, soft texture of the place has decay mildew, borer borers into which winter, high density.