美国白蛾是世界危险性检疫害虫。原产于北美,本世纪上半叶先后传人亚洲的日本、韩国以及欧洲部分地区并猖獗成灾。该虫1979年在我国辽宁最早发现,几年间已蔓延至山东、陕西、河北几个省份部分地区,成为当地主要的林木及农田作物害虫。 美国白蛾一年发生二代,以幼虫缀叶取食,结成网幕,可将植物叶片全部吃光。它的寄主植物很多,林木、果树、 American white moth is a dangerous quarantine pest in the world. Originated in North America, Japan and South Korea, as well as parts of Europe, which have been handed over to Asia in the first half of this century, have been rampant. The worm first discovered in Liaoning in China in 1979 and spread to parts of Shandong, Shaanxi and Hebei provinces in a few years and became the major pests of forest and farmland in the area. The second generation of the American white moth occurs in one year, feeding the larvae into the leaves and forming a net. All the leaves of the plant can be eaten. Its host plant a lot, trees, fruit trees,