一、症状卡特兰花上发病。初在花瓣及茎片上生成水浸状小斑点,一般情况下斑点不发展,但空气湿度大时病斑逐渐扩展,严重时发生水浸状褐色腐烂,在温室内病部会产生灰色霉层。二、病原为灰葡萄孢霉。三、传染途径本病原菌喜低温高 First, the symptoms Carter orchid disease. Early in the petals and stems on the formation of flooding small spots, under normal circumstances the spot does not develop, but when the air humidity is gradually extended lesion, severe flooding brown decay occurs in the interior of the greenhouse gray mold layer. Second, the pathogen Botrytis cinerea. Third, the route of transmission The pathogens like low temperature