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Japanese oak wilt : ウィキペディア英語版
Japanese oak wilt
Japanese oak wilt(also called moortality of oak trees in Japan) is a fungal disease caused by ''Raffaelea quercivora'' fungus affecting by oak trees. In 1998, Japanese plant pathologists group was isolation, inoculation and reisolation the dead tree.〔Ito S., Kubono T., Sahasi N., Yamada T.(1998)(Associated fungi with the mass mortality of oak trees ). ''Journal of the Japanese Forestry Society 80(3), 170-175.''〕 It's the first disease known that ''Raffaela'' fungus cause plant disease.
==Symptoms==
The first obvious symptom is the leaves wilt, and many small holes are on the trunk. The leaves turned to red and dieback quickly (1 or 2 weeks), finally the tree dead. If you cut the dead tree, you discovered the xylem are discolored to brown.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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