異なる温度条件下における罹病枯死葉上のマンゴー炭疽病菌<i>Colletotrichum gloeosporioides</i>の生存期間

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  • Survival Period of <i>Colletotrichum gloeosporioides</i>, causal agent of mango anthracnose, on diseased withered leaves of mango at different temperatures
  • 異なる温度条件下における罹病枯死葉上のマンゴー炭疽病菌Colletotrichum gloeosporioidesの生存期間
  • コトナル オンド ジョウケン カ ニ オケル リビョウ コシ ヨウ ジョウ ノ マンゴータンソビョウキン Colletotrichum gloeosporioides ノ セイゾン キカン

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We investigated the survival period of Colletotrichum gloeosporioides on anthracnosediseased withered mango leaves under varying temperature conditions. Conidial masses on the diseased withered leaves survived for 120, 150, 210, and more than 300 days at the temperature conditions of 35 °C, 25 °C, 15 °C, and 10 °C, respectively. A strain was isolated from a diseased withered leaf of each temperature condition, and all four isolates were confirmed to cause disease on fruit. In summary, C. gloeosporioides was able to survive for long periods on diseased withered leaves, with survival period increasing with decreasing temperature. Furthermore, the long survival period did not reduce pathogenicity. These results suggest that diseased withered leaves and debris in the field may serve as an infection source for mango anthracnose.

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