一、霜疫霉病。此病主要危害近成熟的果实,在连续下雨的高温高湿天气,病害发展快,管理粗放的果园发病重。病原为真菌,多从果蒂开始发生,初期果皮表面出现褐色或黑色的不规则病班,以后迅速扩展蔓延,终致全果变黑色,果肉腐烂,有酸味和酒味,并流出褐色汁液。病害发生中后期,病斑表面长出 First frost mold disease. The disease is mainly endangering the fruits of the recent maturity. In the continuously raining hot and humid weather, the disease develops rapidly and the extensively managed orchards have a heavy incidence. Pathogenic fungi, and more from the beginning of the occurrence of fruit pedicle, the initial appearance of brown or black skin irregularities on the surface of the disease, after the rapid expansion of the spread, and eventually the whole fruit becomes black, rotten fruit, sour and alcohol, and out of the brown juice. Disease occurs in the late period, the surface of the lesion grows