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桑剑纹夜蛾Acronycta major Bremer俗名桑夜蛾、香椿毛虫、黄毛毛虫、属鳞翅目,夜蛾科。该虫在涞水县丘陵地区的娄村、石亭、洛平、义合庄、宋各庄、虎过庄等公社的香椿集中产区发生严重,在相邻的涿县及北京市的房山县也有发生。该虫单食性,是香椿叶部主要害虫。被害后,造成第二次发芽,被害轻者来年发芽晚,重者枝条大量枯死,树势极度衰弱,影响当年受害的香椿树的正常生长和翌年香椿叶的产量和质量。为掌握其生活规律和找出有效的防治方法,于1979—1980年,对此害虫的生物学特性及其防治方法,进行了观察研究,现将材料整理如下:
Mulberry Sesamum Sf. Acronycta major Bremer Commonly known as Sanguinea, Toona caterpillar, caterpillar, Lepidoptera, noctuid. The insects in Langshuang Hilly area Loucun, Shiting, Luoping, Yihezhuang, Songgezhuang, Tiger too Zhuang commune and other communes of Toon concentrated production areas in serious occurrence in neighboring Pixian and Beijing Fangshan County has also occurred. The pest insects, is the main pest of Toona sinensis. Victims, resulting in the second germination, the victims of the light of the sprouting late in the coming year, heavy dead branches, the extreme weakness of the tree, affecting the normal growth of Toona sinensis victims and the following year Toona sinensis leaf yield and quality. In order to grasp the law of its life and find out the effective control methods, from 1979 to 1980, the biological characteristics of pests and their prevention and treatment methods were observed and studied, the material is now organized as follows: