Abstract
In September 2015, stem blight was found on Joseph’s coat amaranth (Amaranthus tricolor) in Kanagawa, Japan. A fungus was isolated from brown spots on the stems and leaves. After our inoculation tests using the isolated fungus, the same symptoms were observed in the field. The pathogen was identified as Diaporthe amaranthophila based on morphological and molecular analyses. This is the first report of D. amaranthophila as a pathogen of stem blight on Joseph’s coat amaranth in Japan.
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Acknowledgements
We thank Dr. Hiromichi Horie for hosting a collecting trip that aided in the discovery of this disease. We also thank Tomoko Ohta for advising us about molecular methods.
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Minoshima, A., Orihara, N., Minoguchi, K. et al. First report of stem blight on Joseph’s coat amaranth (Amaranthus tricolor L.) caused by Diaporthe amaranthophila (Inácio, Dianese & Carlos) Rossman & Udayanga in Japan. J Gen Plant Pathol 86, 70–75 (2020). https://doi.org/10.1007/s10327-019-00885-3
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DOI: https://doi.org/10.1007/s10327-019-00885-3