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白桦尺蠖(phigalia djakonovi Moltrecht)属鳞翅目尺蛾科。国外分布在苏联(乌苏里地区)、日本(北海道)。在国内首次发现于内蒙古大兴安岭林区。主要为害白桦,其次为山杨、柳及林内灌木。近年来,内蒙古大兴安岭林区白桦尺蠖大面积暴发成灾。1981年开始发生,1982年成灾面积为6万亩,1983～1984年达50万亩以上,白桦死亡数千亩。为了研究该虫的生物学特性,有效地开展防治,笔者于1983～1984年参加了库都尔和乌尔旗汉两个测报点的工作,对白桦尺蠖进行了系统观察研究和防治试验。现将主要结果摘要如下。
The birch bark (phigalia djakonovi Moltrecht) Lepidoptera moth family. Foreign distribution in the Soviet Union (Ussuri region), Japan (Hokkaido). In the country for the first time found in Inner Mongolia Daxinganling forest. The main damage to birch, followed by aspen, willow and forest shrubs. In recent years, large-scale outbreaks of white birch feet in the Greater Xing’an Mountains in Inner Mongolia have been disastrous. Occurred in 1981, the disaster area of 6 million acres in 1982, 1983 to 1984 amounted to 500000 mus of more than a few acres of white birch death. In order to study the biological characteristics of the insect and effectively carry out prevention and control, the author participated in the two reporting points of Kuduer and Urqiqihan between 1983 and 1984, and systematically observed and controlled the test of the birch scale. The main results are summarized as follows.