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美国白蛾原产于北美。在北美,其分布范围由加拿大的森林地带(北部)至美国的亚热带(南部)。在北部,该虫每年发生一代,在南部二代以至三代(A.D.Oliver,1964,R.F.Morris,1967;E.П.Иван-чиК,1973)。在四十年代,美国白蛾被带到欧洲和亚洲后,蔓延于广大的地区。现已查明分布在奥地利、保加利亚、匈牙利、罗马尼亚、捷克斯洛伐克、南斯拉夫、朝鲜半岛及日本诸岛。据欧洲与地中海地区植物保护组织报导(1977年),又在法国的波尔多
American white moth native to North America. In North America, its distribution ranges from the forests of Canada (north) to the subtropics (south) of the United States. In the north, the pest occurs one generation per year in the second and third generation in the south (A.D. Oliver, 1964, R.F. Morris, 1967; E.П.Иван-чиК, 1973). In the 1940s, when the American white moth was brought to Europe and Asia, it spread to vast areas. It has been identified in Austria, Bulgaria, Hungary, Romania, Czechoslovakia, Yugoslavia, the Korean Peninsula and the Japanese islands. According to reports from the European and Mediterranean Plant Protection Organization (1977) and again in Bordeaux, France