苹果树的腐烂病是果树的一种毁灭性病害,如不及时防治,可造成苹果树地上部大量死亡。我连果园过去管理粗放,对果树施肥很少,灌水不及时,加上由匍匐栽培改成直立栽培,去枝多,修剪过重,造成部分树势生长衰弱,以至连年发生腐烂病,一般发病期在五至八月,一九七一年因腐烂病而死亡的果树达100棵以上。 Apple tree rot disease is a devastating disease of fruit trees, if not controlled in time, can cause a large number of apple tree shoot death. In the past, I used to have extensive management of the orchards, poorly fertilizing the fruit trees, shortening the irrigation time, changing from prostrate to erect cultivation, to branches and over-pruning, resulting in the partial growth of tree vigor weak and even the occurrence of rot disease in successive years In the period from May to August and in 1981, more than 100 fruit trees were dying due to rot disease.