根据我站近几年调查，圆斑根腐病在济南市长清区大田种植葡萄上有零星发生，但在庭院巨峰葡萄上发病严重。一般每年６月中旬始见病叶，病株率４０％以上，病叶率１０％左右，并迅速扩展，到８月中旬，病株率８０％，病叶率８０％以上，严重的１００％，并且叶片枯焦脱落，影响 According to my station survey in recent years, spot root rot in Changning District of Jinan field planting grapes sporadic, but the incidence of serious grapes in the courtyard Kyoho. Generally seen in mid-June each year the disease leaves, the diseased plant rate of 40% or more, the diseased leaf rate of about 10% and rapidly expanding to the middle of August, the diseased plant rate of 80%, the diseased leaf rate of 80% or more, severe 100% , And leaves off focus, affect