草莓灰霉病是大棚草莓的重要病害,花器和果实一旦染病,很快腐烂并迅速传播,对产量影响很大,重者可减产40%以上。发病条件:该病菌发育最适宜温度为18~25℃,空气相对湿度达80%以上。田间积水、种植过密、通风换气不当等,都会加重该病的发生和蔓延。发病症状:发病处初呈水渍状小斑点,后扩展成近圆形或不规 Strawberry gray mold is an important disease of strawberry in greenhouse. Once the flower and fruit are infected, it decays quickly and spreads rapidly, which has a great impact on the yield. In severe cases, the yield can be reduced by over 40%. Incidence conditions: the most suitable temperature for the development of the bacteria 18 ~ 25 ℃, air relative humidity of 80% or more. Field water, planting too close, improper ventilation, etc., will aggravate the occurrence and spread of the disease. Morbidity symptoms: The incidence of early spot was water-like small spots, after the expansion into a nearly circular or irregular