Articles
A GRAFT-TRANSMISSIBLE DISEASE “SOHI-BYO” OF JAPANESE PEAR THAT OCCURS IN OKAYAMA PREFECTURE, JAPAN
Article number
587_88
Pages
665 – 668
Language
English
Abstract
A disease of Japanese pear which induces rough bark of shoots and deformation of fruits was found in the Okayama Prefecture in Japan.
The symptoms are mainly wavy leaves, rough-surfaces with bark necroses of shoots and deformation of fruits.
The symptoms on the shoots and fruits appeared within 2~3 years of Japanese pear cvs.
Niitaka, Atago and Housui being top-grafted onto affected trees of the pear cv.
Okusankichi.
It appeared within 3~6 years on Okusankichi and Kousui which were worked onto pear rootstocks by a double grafting method.
It became clear that the disease is graft-transmissible.
These results show that the disease of Japanese pear cv.
Okusankichi in Okayama Pref. is the sohi-byo disease previously reported.
The symptoms are mainly wavy leaves, rough-surfaces with bark necroses of shoots and deformation of fruits.
The symptoms on the shoots and fruits appeared within 2~3 years of Japanese pear cvs.
Niitaka, Atago and Housui being top-grafted onto affected trees of the pear cv.
Okusankichi.
It appeared within 3~6 years on Okusankichi and Kousui which were worked onto pear rootstocks by a double grafting method.
It became clear that the disease is graft-transmissible.
These results show that the disease of Japanese pear cv.
Okusankichi in Okayama Pref. is the sohi-byo disease previously reported.
Publication
Authors
H. Nasu, H. Osaki
Keywords
Pyrus pyrifolia, Pear disease, Graft-infection, fruit deformation, rough bark
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