Studies on Varietal Resistance and Chemical Control to the Wilt of Strawberry caused by Fusarium oxysporum

Fusaium oxysporum에 의한 양딸기 시들음병의 약제방제 및 품종저항성에 관한 연구

  • Kim C.H. (Institute of Agricultural Sciences, ORD) ;
  • Seo H.D. (Horticultural Experiment Station, ORD) ;
  • Cho W.D. (Institute of Agricultural Sciences, ORD) ;
  • Kim S.B. (Horticultural Experiment Station, ORD)
  • 김충회 (농촌진흥청 농업기술연구소) ;
  • 서효덕 (농촌진흥청 원예시험장) ;
  • 조원대 (농촌진흥청 농업기술연구소) ;
  • 김성봉 (농촌진흥청 원예시험장)
  • Published : 1982.06.01


The strawberry cultivar Hokowase showing rapid wilting and death around harvest time was first found in the fold at Woongcheon, Chungnam province in 1974. The fungus, Fusarium oxysporum was isolated frequently from the crown, petiole and root of strawberry plants collected from Woongcheon and was pathogenic to Hokowase. The fungus abundantly produced micro-and macro-conidia and chiamydospore on PSA. The size of micro conidia, macro conidia and Chlamydospores was $5.0\~13.0\times2.5\~3.0,\;12.8\~62.5\times2.5\times50\mu\;and\;7.5\~13.8\times5.5\~12.5\mu$, respectively. Mycelial growth of the fungus was best between $25\~30^{\circ}C$ on PSA. The disease at Woongcheon occurred from the end of March and incidence of the disease increased from the beginning of May reaching $40.2\%$ of diseased Plants at the 1st part of June. In laboratory and field evaluation tests with twelve fungicides, Difolatan, Benlate T and Tospin M showed some control effects against the disease although they did not show ignificant differences in effects compared with that of the non-treatment. The cultivar Yachiyo, Daehak 1, Line 10-2, and Senga Sengana were highly resistant, and Harunoka and Empire were moderate resistant whereas Northwest and Hokowase were highly susceptible to the fungus under field condition.