杨金纹细蛾(Lithocolletis sp.)属鳞翅目、细蛾科(Gracilariidae)。近年来在河北省中部、中南部地区和北京市大量发生,很多地方苗圃和幼林株被害率高达百分之百,我校苗圃内毛白杨平均每个叶片有虫斑1—45个,多数10—27个(见图1)。叶片受害后干脆、皱缩、逐渐变黄早落。形成光杆,从而降低苗木质量。 此虫在我国尚无报道。作者自1976年冬至 Lithocolletis sp. Is a Lepidoptera, Gracilariidae. In recent years in central Hebei, central and southern regions and Beijing, a large number of occurrences, many places nursery and young forest strains were as high as one hundred percent damage, my school nursery Populus euphratica on average each leaf spot 1-45, the majority of 10-27 (see picture 1). After the victim leaves simply, shrinkage, and gradually change to yellow fall. Form a polished rod, thus reducing seedling quality. This worm has not been reported in our country. Author from the winter solstice in 1976