Occurrence of Boxthorn Bligth Casued byPhytophthora nicotivanea and P. drechsleri

Phytophthora nicotianae와 P. drechsleri에 의한 구기자 역병의 발생

  • 지형진 (농업과학기술원 식물병리과) ;
  • 곽용범 (농업과학기술원 원예연구소 남해출장소) ;
  • 이봉춘 (충청남도 농천진흥원 청양구기자시험장) ;
  • 조원대 (농업과학기술원 식물병리과)
  • Published : 1998.08.01

Abstract

Since 1995, boxthorn bight caused by Phytophthora spp. has occurred at Chongyang areas in Chungnam province. Infected plants showed yellows and wilt at early stage, but the symptom rapidly progressed into blight due to the decay of roots and basal stem tissues. The disease was relatively severe in poorly drained lowlands and incidence reached ca. 20% in some fields. Two species of Phytophthora were constantly isolated from freshly infected roots and asal stems. Among 39 isolates collected, 26 were identified as P. nicotianae and 13 as P. drechsleri based on their mycological characteristics. Both fungi showed strong pathogenicity to boxthorn cv. Chongyang No. 1. However, the former expressed stronger pathogenicity than the latter. Phytophthora blight of boxthorn caused by the fungi has not been reported n Korea previously.

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