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病原:为类菌质体(mycoplasma—like organism),有时也叫“MLO”。它是介于病毒和细菌之间的一种生物,有原生质膜,无细胞壁。传播:类菌质体由榆白带叶蝉在榆树之间携带。分布:1940年在俄亥俄河谷就已发现。目前分布16个州。在纽约州每年大约向东移
Pathogen: Mycoplasma-like organism, sometimes called “MLO”. It is a living thing between viruses and bacteria, with a plasma membrane and cell-free walls. Propagation: Mycotoxins carried by elm bandhoppers between elm trees. Distribution: 1940 in the Ohio Valley has been found. Currently distributed in 16 states. Moving eastward in New York State each year