65.如何防治鸭梨黑心病鸭梨黑心病是梨贮藏生理病害之一,雪花梨、长把梨也有类似现象。病变果先在梨心附近发生褐变,随后整个果心褐变,严重时波及果肉,果皮变暗,食之有酒味。在入库初期,果皮尚呈绿色或黄绿色时,果心开始变褐,称为“早期黑心”,主要由于鸭梨入库后,降温过快,引起低温伤害。另一种“后期黑心”,主要发生在贮藏后期,翌年2～3月份,果心果肉发生褐变。果实衰老引起的生理病害。 65. How to prevent black pears disease Pear Black pears disease is one of pear physiological diseases stored, snow pear, pears also have a similar phenomenon. The lesion first browning occurs near the pear heart, followed by the browning of the whole fruit heart, affecting the flesh in severe cases, darkening the peel, eating wine taste. In the early storage, the peel was still green or yellow-green, the fruit began to brown, known as the “early black heart”, mainly due to the pear after storage, cooling too fast, causing cold damage. Another “late black”, mainly occurs in the late storage, the next 2 to 3 months, fruit pulp browning. Physiological diseases caused by fruit senescence.