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1986年6月9日和6月30日,上海市林业站从荷兰进口两批扶郎花(又名非洲菊)苗,一半栽于林业站内,一半栽于上海县梅垅园艺场苗圃内。11月初起,栽于梅垅的扶郎花苗上发生严重的死苗现象。经田间观察和实验室鉴定,认为是菌核病。症状和发病原因:最初在植株接近地面的茎、叶柄上出现水渍状淡褐色至褐色的病斑,后逐步引起茎基部软腐,病斑向上蔓延,可致全株腐烂。空气湿度较大时病部可长出白色绵毛状菌丝体。后期病部会长出黑色菌核。发病的叶柄组织后期腐朽,碎裂成乱麻状,外表及组
On June 9 and June 30, 1986, Shanghai Forestry Station imported two sets of Gerbera (aka Gerbera) seedlings from the Netherlands. Half of them were planted in forestry stations and half of them were planted in the Meitai Horticultural Field Nursery in Shanghai. From early November onwards, planted in plum Geru Hua Miao serious grave death phenomenon. After field observation and laboratory identification, that is sclerotinia. Symptoms and causes: the first plant near the ground stems and petioles appear water stains light brown to brown spots, after gradually causing the stem base of soft rot, lesions spread upwards, can cause whole plant decay. When the air humidity is larger, the disease may grow white mycelial mycelium. Later disease department president black sclerotia. The incidence of petioles later decay, fragmentation into a mess, appearance and group