Abstract
2004년부터 2005년까지 거제시 거제면 팔손이 재배 농가포장에서 잎과 줄기가 수침상으로 물러지고 썩으면서, 그 부위에 흰색 곰팡이와 균핵이 생기고 시들어 죽는 증상이 발생하였다. 균총은 흰색에서 연한 회색을 띄었다. 균핵은 구형, 타원형 또는 불규칙형으로 검은색이었다. 자낭반은 컵모양이며, 크기는 <TEX>$0.8{\sim}1.3 cm$</TEX>이었다. 자낭은 원통형이고 크기는 <TEX>$70{\sim}220{\times}4{\sim}18{\mu}m$</TEX>이었다. 자낭포자는 타원형, 단세포, 무색이며 크기는<TEX>$6{\sim}12{\times}4{\sim}6{\mu}m$</TEX>이었다. 균사생육 최적온도는 <TEX>$25^{\circ}C$</TEX>였다. 이상과 같이 병원균의 균학적 특정과 병원성을 검정한 결과, Sclerotinia sclerotiorum으로 동정하였으며, 이 병을 팔손이 균핵병으로 명명할 것을 제안한다. Sclerotinia rot was occurred on the leaf and stem of Fatsia japonica in Geoje city, Gyeongnam province in Korea from 2004 to 2005. The typical symptom of the disease was water-soaked infected leaves and stems. The colony of the isolated fungus was white to faintly gray in color. Apothecia were cup-shaped with numerous asci and <TEX>$0.8{\sim}1.3 cm$</TEX> in size. Asci were cylindrical in shape and <TEX>$70{\sim}220{\times}4{\sim}18{\mu}m$</TEX> in size. Ascospores were aseptate, hyaline, ellipsoid in shape, and <TEX>$6{\sim}12{\times}4{\sim}6{\mu}m$</TEX> in size. Sclerotia formed on the plants and PDA medium were globose to cylindrical or irregular in shape, black in color. The optimum temperature for mycelial growth was <TEX>$25^{\circ}C$</TEX>. This is the first report on the Sclerotinia rot of Fatsia japonica caused by Sclerotinia sclerotiorum in Korea.
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