Distribution of the larch brown rust caused byTriphragmiopsis laricinum (Uredinales) in Russian Far East |
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| Authors: | Yoshitaka Ono Zinaida M Azbukina Makoto Kakishima Shigeru Kaneko |
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| Institution: | (1) Faculty of Education, Ibaraki University, 310 Mito, Japan;(2) Institute of Biology and Pedology, Russian Academy of Sciences, 690022 Vladivostok, Russia;(3) Institute of Agriculture and Forestry, University of Tsukuba, 305 Tsukuba, Japan;(4) Forestry and Forest Products Research Institute, 305 Ibaraki, Japan |
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| Abstract: | The larch brown rust caused byTriphragmiopsis laricinum was found onLarix cajandri in Primorsky Territory, Russia. This was a new host and locality record for the pathogen. Preliminary survey of the disease
incidence in several localities in East and Northeast Russia and Yakutia-Sakha Republic indicated the restricted distribution
of the rust in a few localities in Primorsky Territory. As previously reported in China,T. laricinum was proved to form uredinia in nature and to be able to propagate vegetatively by urediniospores. This suggests the fungus
could become a devastating pathogen threatening a large-scale larch plantation in Far East of Russia. Field observations and
the failure of basidiospore inoculation onto larch needles suggest the heteroecious life cycle ofT. laricinum. |
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| Keywords: | Larix life cycle Russia rust disease Triphragmiopsis |
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