青杨叶锈病俗称黄粉病,因为这种病害的病原菌的另一个转主寄主是落叶松,所以又叫落叶松锈病。该病极为普遍,从小苗到大树都能发病,而以小苗及幼树受害严重,青杨叶锈病的转主寄主为落叶松,所以最早发病的是落叶松,然后才在杨叶上发病。落叶松发病初期,在叶上表面看到桔黄色小疱疹,上面有黑褐色小点,这是病菌的精子器,叶下 Poplar leaf rust commonly known as powdery mildew, because the disease is the main host of other diseases turn larch, so called rust of larch. The disease is extremely common, from seedlings to the tree can attack, and seedlings and young trees suffer serious damage, the main host of green leaf rust is larch, so the earliest onset of larch, and then the disease in the leaves . The early onset of larch, saw the orange leaves on the surface of small herpes, there are dark brown dots, which is the germ sperm, leaf