Abstract

2005년 3월경 경남농업기술원 움막저장고에서 저장중이던 초석잠의 덩이줄기에 이상증상이 발생하였다. 병징은 초석잠 덩이줄기 부분이 수침상으로 물러지고 썩으면서 병반부위에 회색의 곰팡이가 많이 생겼다. 분생포자는 무색, 단포자이며 난형 또는 타원형으로 크기는 <TEX>$5{\sim}16{\times}4{\sim}12{\mu}m$</TEX>였다. 분생포자경은 갈색으로 격막이 있고 나무가지 모양이며, 폭은 <TEX>$14{\sim}30{\mu}m$</TEX>였다. 균사생육과 균핵형성 적온은 <TEX>$20^{\circ}C$</TEX>였다. 초석잠에서 병징과 병원균의 균학적 특징, 병원성을 조사한 결과 Botrytis cinerea Persoon:Fries에 의한 초석잠 잿빛곰팡이병으로 동정하였다. In March of 2005, gray mold disease caused by Botrytis cinereu on Stachys sieboldii Miq. was occurred in the mud cellar storage of Gyeongsangnam-do Agricultural Research and Extension Services, Korea. The symptoms started with water-soaked and rotten in the tubers. The conidia were one celled and mostly ellipsoid or ovoid in shape and light gray in color. The conidia were <TEX>$5{\sim}16{\times}4{\sim}12{\mu}m$</TEX> in size and the conidiophores were <TEX>$14{\sim}30{\mu}m$</TEX> in length. The pathogen formed conidia and sclerotia abundantly on PDA. The optimal temperature for mycelial growth and sclelotia formation was <TEX>$20^{\circ}C$</TEX>. On the basis of symptom, mycological characteristics and pathogenicity test on host plants, the fungus was identified as Botrytis cinerea Persoon: Fries. This is the first report on gray mold of S. sieboldii caused by B. cinerea in Korea.

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