甘肃兰州市连城实验林场,近三年来杨尺蠖Apocheima cinerarius Erschoff为害十分猖獗。1981年林区被害面积6万亩,1982年为10万亩,1983年达22万亩。该虫发生期早、食量大、食性杂,主要为害杨树、桦树、云杉及多种灌木。据调查:被害株率76.6％,平均每株有幼虫1万头以上。 Liancheng Experimental Forest Farm in Lanzhou City, Gansu Province, the last three years, Apocheima cinerarius Erschoff is very rampant. In 1981, the area harmed by forests was 60,000 mu, 100,000 mu in 1982 and 22 million mu in 1983. Early occurrence of the worm, food intake, food Miscellaneous, the main damage poplar, birch, spruce and a variety of shrubs. According to the survey: 76.6% of victims of strains, an average of more than 10,000 larvae per plant.