Current status of bamboo die back caused by the destructive disease "witches'- broom of bamboo" in western Japan

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  • タケ類天狗巣病による西日本の竹林の衰退
  • タケルイ テング ソウビョウ ニ ヨル ニシニホン ノ チクリン ノ スイタイ

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Witches'- broom of bamboo, caused by the fungus Aciculosporium take (Cavicipitaceae), is the most destructive of bamboo diseases. We investigated disease incidence and bamboo damage resulting from the disease, particularly in Phyllostachys bambusoides and P. pubescens communities, in western Japan. Our investigation revealed that in 17 prefectures, 93.2% of P. bambusoides communities had the disease, and that in 10 of the prefectures several P. bambusoides communities were severely damaged. In contrast, only 3.9% of P. pubescens communities had the disease, and in six prefectures the disease had not infected P. pubescens communities. However, in a supplementary investigation, we found numerous infected P. pubescens communities in the Shizuoka Prefecture in central Japan, but few of these communities were heavily damaged. These results indicated that the number of P. bambusoides communities killed by witches' broom of bamboo may increase in the near future throughout western Japan, and that the disease rarely kills P. pubescens communities.

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