早春3～5月份是苹果树腐烂病发病高峰期。发病部位主要在树的主干和大枝上。烂皮呈红褐色、稍肿大,用手按时松软,易剥离撕开,内有强烈的酒精味。腐烂病全年都可发生,弱树最易发病,稍一放松管护就有复发和病情加重的趋势。 防治腐烂病应在早春发芽前抓好防护管理,具体要做好以下几方面工作。 一、刮除病斑、剪除病枝 在果树萌芽前一月内,结合春季修剪,发现病斑、病枝及时刮除、剪下,收集烧毁。病斑刮成梭形,边缘 March to May is the peak incidence of apple tree rot disease. The main part of the disease in the trunk and branch of the tree. Rotten skin was reddish brown, slightly swollen, soft hand when pressed, easy to peel tear, there is a strong taste of alcohol. Rot disease can occur throughout the year, the most vulnerable to the onset of weak trees, there is a slight relaxation of management recurrence and the disease aggravate the trend. Prevention of rot disease should be done in early spring before the germination prevention and management, to do the following specific aspects of the work. First, curettage lesion, cut off the diseased branches in the fruit within one month before the sprout, combined with spring pruning and found lesions, diseased branches curettage, cut, collect and burn. Spotted into a fusiform spindle, the edge