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| Identification of pathogen causing corynesporaleaf spot of tobacco in Jiangxi |
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| Abstract: |
| In order to identify the pathogen of flue－cured tobacco corynespora leaf spot disease in Ji’an，Jiangxi
Province，the fungi was isolated from diseased tobacco leaves. Based on the pathogenicity，morphological characteristics
and the sequence of ribosomal DNA －ITS，the pathogen was identified as Corynespora cassiicola，and the homology
analysis showed the sequence of ribosomal DNA －ITS isolated from the strains had homology of more than 99% with
Corynespora cassiicola published in GenBank. Finally，the pathogen was indicated as Corynespora cassiicola（Berk. ＆
Curt.）Wei. The results of biological characteristics showed that fungus couldn’t survive below 9℃ or above 39℃，grew
best at 26.5℃. It produced the most spores at 29℃，and the conidia germination was the most at 26.5℃. The disease is
the first report in Jiangxi，China. |
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