苹果贮藏期间发生的几种生理性病害和寄生病害,是影响贮藏效果的重要因素。采取正确的防治措施,可以大幅度减少果品损失,增加经济收益。1.苹果苦痘病:此病一般在果实接近成熟时即可发生,在贮藏初期的1—2个月最重。症状初期,皮下果肉褐变,果面稍有凹陷,色较暗,病斑呈圆形,在绿色品种上为深绿色,在红色品种上呈紫红色。病斑下的果肉坏死干缩,深0.5厘米左右,味苦。严重后病斑显著凹陷,变为深褐色至黑褐色。一般近果顶处发病较多。此病的发生主要与果实中的氮、钙含量及氮钙比有关。氮量过大造 Several physiological diseases and parasitic diseases occurred during the storage of apple are important factors that affect the storage effect. Take the correct prevention and control measures can greatly reduce fruit losses and increase economic returns. 1 apple bitter pox disease: The disease usually occurs when the fruit is almost mature, 1-2 months in the early storage of the heaviest. Early symptoms, brown skin subcutaneous flesh, the fruit surface slightly depressed, darker color, the lesion was round, dark green on the green varieties, was purple on the red varieties. Lesions under the necrosis of the flesh shrinkage, about 0.5 cm deep, bitter taste. Severe lesions significantly concave, dark brown to dark brown. Generally near the top of the incidence of more. The occurrence of the disease mainly with the fruit of nitrogen, calcium content and ratio of nitrogen and calcium. Nitrogen is too large