近年来,洛阳地区牡丹根腐病发生日趋加重,严重影响了牡丹的生长、开花品质及观赏价值。下面就牡丹根腐病的症状表现、发病原因及防治措施介绍如下。1根腐病的症状此病主要危害牡丹的根部。植株感病后,初期地上部分长势衰弱,叶片发黄、失绿,偶有泛红,有的叶片表现为叶脉变黄、红 In recent years, the occurrence of root rot of peony in Luoyang area has been aggravating day by day, seriously affecting the growth, flowering quality and ornamental value of peony. The following symptoms of peony root rot, the etiology and prevention measures are described below. Symptoms of a root rot disease the main damage to the roots of peonies. Plant susceptible, the early part of the growing weak on the ground, leaves yellow, green, occasionally red, and some leaves showed yellow veins, red