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我们于一九八一年六、七月间发现湖口县流泗公社的流泗、红中、莲花、仓前、红卫等大队,共五、六千亩的棉田,程度不同地遭受梨剑纹夜蛾Acronycta rumicis(Linnaus)幼虫的零星为害,其幼虫同时还为害莴苣和牛皮菜。棉花被害株率一般达0.3—0.56%,个别典型棉地的被害株率高达5.27%。虽然没有造成比较大的虫灾,但象这样为害棉花和蔬菜,过去还未见有记载。据我们调查观察,梨剑纹夜蛾是以三至五令幼虫蚕食棉叶,一直把叶子吃得仅剩叶柄或靠近叶柄附近的几根较粗的叶脉,然后再爬到另外一片棉叶上为害,有的能把整株棉苗上的叶子吃光,使棉苗成为光杆。
In June and July 1981, we found the Liusi, Red, Lotus, Cangqian, Hongwei and other brigades in Liusi County, Hukou County, a total of five or six thousand acres of cotton fields, varying degrees of suffering pear Spodoptera lutea Acronycta rumicis (Linnaus) larvae sporadic damage, the larvae also lettuce and lettuce. Damage rate of cotton plants generally reach 0.3-0.56%, the individual strain of cotton in the typical high rate of 5.27%. Although it did not cause a relatively large pest, but such damage to cotton and vegetables, the past has not been documented. According to our survey, pear larvae are three to five larvae eating cotton leaves, the leaves have been eating only petiole or petiole near the edge of a few thick veins, and then climb to another piece of cotton leaf Damage, and some can eat the leaves of the whole plant cotton seedlings, so that cotton seedlings become polished rod.