The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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Occurrence of Sclerotinia Rot on Cucurbitaceous Vegetable Crops in Greenhouses

온실재배 박과 채소작물에서의 균핵병 발생

  • Kim, Wan-Gyu (Plant Pathology Division, Department of Crop Protection, National Institute of Agricultural Science and Technology) ;
  • Cho, Weon-Dae (Plant Pathology Division, Department of Crop Protection, National Institute of Agricultural Science and Technology) ;
  • Jee, Hyeong-Jin (Plant Pathology Division, Department of Crop Protection, National Institute of Agricultural Science and Technology)
  • 김완규 (농업과학기술원 작물보호부 식물병리과) ;
  • 조원대 (농업과학기술원 작물보호부 식물병리과) ;
  • 지형진 (농업과학기술원 작물보호부 식물병리과)
  • Published : 1999.06.30
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Abstract

Cucurbitaceous vegetable crops grown in greenhouses in Korea were surveyed from 1995 to 1997. Incidence of Sclerotinia rot was as high as $30{\sim}70%$ at its maximum on Cucumis melo var. reticulatus (netted melon), Cucumis sativus (cucumber), Cucurbita moschata (pumpkin) and Cucurbita pepo (summer squash) but relatively low on Citrullus lanatus (watermelon) and Cucumis melo var. makuwa (oriental melon). Symptoms of Sclerotinia rot developed on stems of all the cucurbits, fruits of five cucurbits except C. lanatus, petioles of two Cucurbita spp. and leaves of C. moschata. A total of 126 isolates of Sclerotinia sp. were obtained from the lesions and identified as Sclerotinia sclerotiorum based on the morphological and cultural characteristics. The fungus was very frequently isolated from stems and fruits of the cucurbits but rarely from petioles and leaves. Six isolates of the fungus were pathogenic to six cucurbits tested although there was some difference in virulence among the isolates to some of the hosts. C. lanatus was the most susceptible to the isolates, whereas C. melo var. makuwa was the most resistant. C. melo var. reticulatus and C. sativus were relatively susceptible to the isolates, and C. moschata and C. pepo relatively resistant.

1995년부터 1997년까지 국내 온실에서 재배중인 6종의 박과 채소작물에서의 균핵병 발생을 조사한 결과, 메론, 오이, 동양호박 및 쥬키니호박에서 최고 $30{\sim}70%$로서 심하게 발생하였으며, 수박과 참의에서는 비교적 낮게 발생하였다. 균핵병의 병징은 전 박과 채소작물의 줄기에서 발생하였으며, 수박을 제의한 5종의 박과 채소작물의 과실, 동양호박과 쥬키니호박의 잎자루 및 동양호박의 잎에서도 발생하였다. 병반에서는 총 126균주가 분리되었으며, 분리균주들은 모두 그 형태적 및 배양적 특성에 따라 Sclerotinia sclerotiorum으로 동정되었다. 이 균은 박과 채소작물의 줄기와 과실에서 가장 빈번하게 분리되었으며, 잎자루와 잎에서는 드물게 분리되었다. 6균주를 공시하여 병원성검정을 실시한 결과, 공시균주들은 일부 기주에 대한 병원력에 있어서 균주간에 다소 차이를 보였으나 6종의 전 박과 채소작물에 대해 모두 병원성을 나타냈다. 수박은 공시균주 들에 대해 가장 감수성인 반면에 참의는 가장 저항성이었다. 또한 메론과 오이는 공시균주들에 대해 비교적 감수성이었으며, 동양호박과 쥬키니호박은 비교적 저항성이었다.

Keywords

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