果树黄化病,又叫黄叶病。近年来,在我省的苹果、桃、梨等果树上发生极为严重。其症状表现为叶片的失绿黄化,新生的幼嫩叶片变黄绿,进而变白,严重时顶端枯死,呈梢枯状。重病树因树势衰弱导致花芽萌动及新叶长出困难,即使长出,发育不良,严重影响着果品产量和质量,甚至导致树体死亡。 Yellowing disease of fruit trees, also known as yellow leaf disease. In recent years, apples, peaches, pears and other fruit trees in our province have become extremely serious. Symptoms of the performance of the leaves of the loss of green yellow, young green leaves of young, and then white, the top dead serious, was tip-like. Severe diseased trees cause flower buds to germinate and new leaves to grow out of shape due to the weakness of the trees. Even if they grow and grow poorly, they seriously affect the yield and quality of fruits and even cause the death of trees.