Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Phytophthora Foot Rot of Deltoid Synurus Caused by Phytophthora cryptogea

  • Nam, Young-Ju (Global Agro-Consulting Corporation) ;
  • Oh, Sang-Keun (Department of Applied Biology, Chungnam National University) ;
  • Kim, Sun Ha (Department of Applied Biology, Chungnam National University) ;
  • Moon, Youn-Gi (Wild Vegetable Research Institute, Gangwondo Agricultural Research and Extension Services) ;
  • Cho, Weon-Dae (Global Agro-Consulting Corporation) ;
  • Kim, Wan-Gyu (Global Agro-Consulting Corporation)
  • Received : 2022.05.17
  • Accepted : 2022.09.19
  • Published : 2022.09.30
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Abstract

Foot rot symptoms were repeatedly observed on plants of deltoid synurus (Synurus deltoides) growing in a field of the Wild Vegetable Research Institute located in Pyeongchang, Korea during disease surveys in July 2020 and June 2021. The symptoms appeared as wilting of the plant leaves, and the plant stems and petioles at or above the soil line turned dark and rotted. The incidence of diseased plants in the field was 5-10%. Five isolates of Phytophthora sp. were obtained from lesions of the diseased plants and investigated for their morphological and molecular characteristics. All the isolates were identified as Phytophthora cryptogea based on the morphological and molecular characteristics. Three isolates of P. cryptogea were tested for pathogenicity on deltoid synurus plants using artificial inoculation. All the tested isolates caused foot rot symptoms on the inoculated plants. The symptoms were similar to those observed in plants from the field investigated. To our knowledge, this is the first report of P. cryptogea causing Phytophthora foot rot in deltoid synurus.

Keywords

Acknowledgement

This study was supported by a research grant (PJ014507012020) from the Rural Development Administration, Korea.

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