Abstract
In July 2013, a severe postharvest rot of mango fruits (cv. Lippens), with symptoms identical to stem-end rot caused by Lasiodiplodia theobromae or Neofusicoccum parvum, was found in Okinawa Prefecture, Japan. From affected fruit, Diaporthe species were consistently isolated. The isolates reproduced the original symptoms in healthy mango fruits after inoculation and were re-isolated from the inoculated fruits. Based on morphology and a phylogenetic analysis of rDNA-ITS, CAL, H3, EF1-α, and TUB, the isolates were classified into two Diaporthe species (Clade I and Clade II). In terms of susceptibility to procymidone, a registered fungicide against mango stem-end rot in Japan, the two Diaporthe species were less sensitive than previously reported mango stem-end rot pathogens and had MIC and EC50 values higher than the standard concentration applied.
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Acknowledgements
We thank Mr. M. Uechi (Okinawa Prefectural Department of Agriculture, Forestry and Fisheries, Agricultural Planning Division), Ms. M. Tokuyama (Okinawa Prefectural Department of Agriculture, Forestry and Fisheries, Miyako Agriculture, Forestry and Fisheries Promotion Center), Ms. S. Miyagi (Okinawa Prefectural Department of Agriculture, Forestry and Fisheries, Agricultural Support Division), and Mr. S. Tamashiro (Okinawa Prefectural Department of Agriculture, Forestry and Fisheries, Chubu Agricultural Development Center) for assistance in sample collection. We also thank Mr. M. Matsumura (Okinawa Prefectural Agricultural Research Center Nago Branch) for providing mango fruits for inoculation. This work was supported by Okinawa Special Promotion grant.
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Ajitomi, A., Minoshima, A., Takushi, T. et al. First report of mango (Mangifera indica) stem-end rot caused by two Diaporthe species and their susceptibility to procymidone. J Gen Plant Pathol 86, 237–244 (2020). https://doi.org/10.1007/s10327-020-00921-7
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DOI: https://doi.org/10.1007/s10327-020-00921-7