在果树栽培过程中,果农往往忽视果树根部病害的防治,导致果树的产量和寿命受到严重影响。 一、果树根部主要病害及症状表现 1.圆斑根腐病。主要为害仁果类、核果类及核桃等果树。病株呈现叶簇萎蔫、叶片向上卷缩、枝条失水皱缩或枯死;叶片失水青干,主脉扩展,有明显红褐色晕带(病健部之间);枝条枯干,皮层下陷、坏死、易脱落等9种地上病症。须根变褐枯死,病根上产生红褐色圆斑,后扩大并深入到木质部,根变黑死亡。 2.紫纹羽病。为害多种果树。地上部表现为叶片变小、黄化,枝条节间缩短,树势衰弱等、根部表现则是从小根开始向大根蔓延。病初在根部产生黄褐色斑块(比健部略深), In the process of fruit tree cultivation, fruit growers often ignore the prevention and treatment of the root diseases of fruit trees, resulting in serious impact on the yield and longevity of fruit trees. First, the main symptoms of fruit tree roots and symptoms 1. Root spot rot. The main damage pomes, stone fruits and walnuts and other fruit trees. The diseased plants showed leaf cluster wilting, the leaves curled upwards, the branches wilted or wilted, the leaves dehydrated and dried, the main veins expanded, and obvious reddish brown halo bands (between the disease and health departments); withered branches and cortical subsidence, Necrosis, easy to fall off and other 9 kinds of ground disease. The whisker browning and withering, produce reddish-brown circular spot on the diseased root, then expand and deep into xylem, the root turns black and dies. 2 purple pattern feather disease. Damage to a variety of fruit trees. Aboveground showed the leaves become smaller, yellow, shorten the internode, shrubs and other weakness, the root performance is from the root to the root of a small root spread. At the beginning of the sick yellowish brown plaques (slightly deeper than the Ministry of Health)