葡萄叶片灰霉病是青岛地区一种新病害,全市巨峰葡萄均有发生。经过4年的观察,该病侵染葡萄叶片,染病叶片变黄枯死,造成大批落果,一般减产约50%,重者减产80%,对葡萄生产威胁很大。该病在6月中旬升始发病,基部叶片最先染病,病叶边缘出现水浸状、大型失绿病斑,逐渐变黄干枯。约经7天左右,病斑向叶片绿色部份继续扩展,病部呈褐色。 Botrytis cinerea leaf gray mold is a new disease in Qingdao, the city Kyoho grape have occurred. After 4 years of observation, the disease invaded grape leaves, infected leaves turn yellow and died, resulting in a large number of fallen fruit, the general reduction of about 50%, the heavy reduction of 80%, a great threat to the production of grapes. The onset of the disease in mid-June, the first leaf base disease, the edge of diseased leaves appear flooding, large-scale loss of green spots, gradually turn yellow dry. After about 7 days, the lesion continues to expand to the green part of the leaf, the part is brown.