一、zhengzhuangbiaoxianxingshuranbinghou，chengkusizhuang

，bokaibingbushupi，kejiantuoyuanxingheisexiaolidian。zhuangshubingbansizhouchengaizhongzhuang
，ruoshuduochengkusizhuang。qiujixiaozhiranbinghou，shengchuhese、圓形斑
，不久枝梢枯死。 

    二
、傳播途徑和發病條件病菌在樹幹或枝條內越冬，翌春孢子由凍傷、chongshanghuorizhuochushangkouqinru

，houbingbushengchuzinangke，bingbancongzaochunzhichuxiabuduankuozhan
，shengxiabingqingkuozhanhuanmanhuotingzhi，ruqiuhouzaicikuozhan。xiaoshutuchangqiyifabing。

    三、fangzhifangfakexueshifei

，quebaoshutijianzhuang，tigaokangbingli。yongdaocaohuomaijiedengweibangshugan，yanfangdonghai。bimianhuojianshaorizhuo，biyaoshi，zaijiankouchutuyao，fangzhibingjunqinru。jishijianchubingzhi，yongdaowachuzhiganshouhaibuwei，bingtuyaobaohu。yaojikexuanyong10波美度的石硫合劑，或45％的晶體石硫合劑15～20倍液等。