Abstract
2004년부터 2005년까지 2년간 경남농업기술원 약초재배 포장에 재배중인 배암차즈기에서 이상증상이 발생하였다. 병징은 잎, 잎자루, 줄기 등 식물체 전부위에서 발생하였다. 식물체가 서서히 시들기 시작하면서 수침상으로 물러지고 썩으면서 갈색 또는 암갈색으로 변색되어 결국 말라 죽는다. 균총의 색깔은 감자한천배지에서 회색이며 배지표면에 분홍색의 분생포자퇴를 형성하였다. 분생포자의 모양은 단세포, 방추형이며, 크기는 <TEX>$8{\sim}17{\times}3{\sim}4\;{\mu}m$</TEX>이었다. 부착기는 연한 암갈색이고 곤봉상이며 크기는 <TEX>$8{\sim}11{\times}4{\sim}6\;{\mu}m$</TEX>이었다. 균사생육 적온은 <TEX>$25^{\circ}C$</TEX>였다. 이상의 결과로 보아, 이 병원균을 Colletotrichum acutatum J. H. Simmonds에 의한 배암차즈기 탄저병으로 명명할 것을 제안한다. Anthracnose of Salvia plebeia caused by Colletotrichum acutatum was observed in the exhibition field of Hamyang-gun, Gyeongsangnam-do Agricultural Research and Extension Services, in Korea. The disease mainly occurred on the leaves, petioles and stems of whole plant. The typical symptoms were water-soaked lesions on stems and petioles, rotted stems and withering then eventually died. The color of colonies of the pathogenic fungus grown on potato dextrose agar was pinkish gray. Conidia were fusiform in shape and was <TEX>$8{\sim}17{\times}3{\sim}4\;{\mu}m$</TEX> in size. Appressoria were pale to dark brown in color, clavate in shape and the sizes were <TEX>$8{\sim}11{\times}4{\sim}6\;{\mu}m$</TEX>. Optimum temperature for mycelial growth was <TEX>$25^{\circ}C$</TEX>. On the basis of mycological characteristics and pathogenicity test on host plants, the fungus was identified as Colletotrichum acutatum J. H. Simmonds. This is the first report on the anthracnose of S. plebeia caused by C. acutatum in Korea.
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