红叶李,又称紫叶李,是落叶小乔木,其叶色紫红、艳丽,常被作为观赏树种在园林绿化中广泛使用。近年来,随着红叶李苗木使用量的大幅度增加及嫁接苗的大量繁殖,为害红叶李的病虫害也随之加剧,特别是红叶李病毒病,尤为严重。其外部典型症状是:叶片退色变淡绿、淡黄,变小,节间缩短,植株矮化,每一枝条顶部叶片退色尤为明显。外部症状初见于四月上旬,十月下旬后未下落的叶片症状消 Red leaf plum, also known as purple leaf plum, is a deciduous tree, its leaves are purple, beautiful, often used as ornamental trees in landscaping widely used. In recent years, with the use of Hongye Li seedlings increased significantly and the large-scale propagation of grafted seedlings, pests and diseases of Hongye plum also intensified, especially the leafy-leaf virus disease, especially serious. The typical symptoms of the exterior are: fading pale green leaves, pale yellow, smaller, internode shortened, plant dwarfing, each branch of the top leaf fade particularly evident. External symptoms first seen in early April, after late October did not fall leaves symptoms disappear