美国白蛾,又名秋幕毛虫,是世界性检疫害虫,是果树、林木的大敌,尤其对桑蚕业威胁极大。此虫开始发生于美国和加拿大,1940年传入匈牙利,二次大战后传入南斯拉夫、罗马尼亚、奥地利、捷克斯洛伐克、苏联和日本,并从日本传入南朝鲜。 American white moth, also known as fall curtain caterpillar, is a worldwide quarantine pest, is the enemy of fruit trees and trees, especially for the silkworm industry. The worm began in the United States and Canada, and was introduced to Hungary in 1940. After the Second World War, it spread to Yugoslavia, Romania, Austria, Czechoslovakia, the Soviet Union and Japan and was transmitted from Japan to south Korea.