苹果缩果病是由硼素供应不足引起的生理性病害,其症状主要表现在果实上,严重时枝叶也显症状。一、果实症状的三种类型1.干斑型多在落花后半月左右开始发生。初在幼果阴面出现近圆形褐色斑点,皮下果肉呈水渍状,半透明,有时病斑表面溢出黄色粘液,后期果肉坏死,变褐至暗褐色,病部干缩凹陷,果实小而畸形,重病果常常早 Apple shrinkage disease is caused by inadequate supply of boron deficiency physiological diseases, the symptoms mainly in the fruit, the branches and leaves were also severe symptoms. First, the three types of fruit symptoms 1. Dry spot more than half a month after falling began to occur. Early appearance in the young fruit near the surface of brown spots, subcutaneous flesh was water-like translucent, sometimes yellow spots on the surface of the mucus spill, late necrosis of the pulp, brown to dark brown, dry shrinkage of the Ministry of depression, small fruit deformities Serious illness often early