柑桔桔萎病(citrus blight)又名幼树退化病(young tree decline)、沙丘退化病(sand hill decline),在美国佛罗里达州普遍为害柑桔树,其病状似缺锌状黄化,凋萎,春梢迟发,叶片稀疏和枝条枯死。5年生以下植株未见发病。枯萎病是一种凋萎型病害,由于木质部功能失灵。引起失水和类似缺锌的病状。在病树的各个部位,导管堵塞。虽进行多方面探索,至今病因未明。 Citrus blight, also known as young tree decline and sand hill decline, is a common citrus tree in Florida, and its symptoms are like zinc deficiency, Wilt, late spring shoots, sparse leaves and dead branches. No incidence of the following plants of 5 years old. Fusarium wilt is a wilting disease due to xylem dysfunction. Cause water loss and similar zinc deficiency symptoms. In all parts of the diseased tree, the catheter is blocked. Although many exploration, so far the etiology is unknown.