Abstract

2002년 7월 경남 통영시 광도면 석류재배 농가포장에서 열매가 부패되는 이상증상이 발생하였다. 분리된 병원균은 감자한천배지에서 균총의 색깔은 흰색이며 물결모양을 이루면서 왕성하게 자랐고, 배지상에서 분생포자각을 잘 형성하였다. 분생포자는 단세포이며 모양은 방추형이고, 색깔은 갈색 또는 올리브색이다. 크기는 10.3~17.4<TEX>$\times$</TEX>2.8~4.0 <TEX>$\mu\textrm{m}$</TEX> 였다. 분생포자 형성 세포는 짧은 원통형이며 무색으로 크기는 12.4~1.4<TEX>$\times$</TEX>2.8~3.6 <TEX>$\mu\textrm{m}$</TEX> 였다. 불생포자각의 모양은 구형이며 갈색으로, 각벽은 2~3세포이고, 크기는 124.6~228.4 <TEX>$\mu\textrm{m}$</TEX> 였다. 균사생육 적온은 <TEX>$25^{\circ}C$</TEX>였다. 분리된 병원균을 건전한 석류에 유상, 무상접종한 결과 접종 3일 후 감염을 일으켰으며, 병원성이 강하였다. 이상과 같이 이 병원균을 Coniella granati에 의한 석류열매 썩음병으로 명명할 것을 제안한다. Fruit rot of pomegranate (Punica granatum) caused by Coniella granati were observed in several farmer's fields in Gwangdo-myon, Tongyeong City, Gyeongnam Province, Korea. The symptoms occurred on fruit with rotting then eventually dropping and mummification. The colony color of causal fungus was whitish on potato dextrose agar. Conidia were single celled, pale brown or olive in color at maturity, straight or slightly curved fusiform in shape, and were 10.3~17.4<TEX>$\times$</TEX>2.8~4.0 <TEX>${\mu}{\textrm}{m}$</TEX> in size. Conidiogenous cell were hyaline, branched only at the base aseptate, elongate, phialidic, enteroblastic and 12.4~1.4<TEX>$\times$</TEX>2.8~3.6 <TEX>${\mu}{\textrm}{m}$</TEX> in size. Pycnidia were black in color and globose in shape and 124.6~228.4 <TEX>${\mu}{\textrm}{m}$</TEX> in size. Optimum temperature for mycelial growth was <TEX>$25^{\circ}C$</TEX>. On the basis of mycological characteristics and pathogenecity test on host plants, the fungus was identified as Coniella granati. This is the first report on the fruit rot of pomegranate caused by Coniella granati in Korea.

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