Abstract

2007년 경상남도농업기술원 과수 포장에 재배중인 블루베리 과실에서 이상증상이 발생하였다. 병징은 성숙한 과실이 수침상으로 물러지고 부패되어지면서 낙과되어거나 미이라 상태로 남아 있으며 과실표면에 분홍색 포자퇴를 많이 형성하였다. 균총은 감자한천배지에서 회색이며 배지표면에 분홍색의 포자퇴를 많이 형성하였다. 분생포자의 모양은 단세포, 무색, 끝이 약간 무딘 원통형이며 크기는 <TEX>$10{\sim}20{\times}3{\sim}5\;{\mu}m$</TEX>이었다. 부착기는 갈색이고 곤봉형, 계란형이며 크기는 <TEX>$6{\sim}18{\times}4{\sim}12\;{\mu}m$</TEX>이었다. 균사생육 적온은 <TEX>$25{\sim}30^{\circ}C$</TEX>였다. 분리된 병원균으로 병원성을 검정한 결과, 자연 감염된 병징과 동일하였다. 이상의 결과를 가지고 본 병해를 Colletotrichum gloeosporioides에 의한 블루베리 탄저병으로 명명할 것을 제안한다. Anthracnose of blueberry (Vaccinium spp.) caused by Colletotrichum gloeosporioides was observed in the exhibition orchard of Gyeongsangnam-do Agricultural Research and Extension Services in Korea, 2007. The typical symptoms were initially water-soaked lesions and then rotten on fruits, the infected fruits were dropped but some of them were hunged and mummified. The pathogenic fungus grown on potato dextrose agar showed greyish to dark gray color. Conidia were straight, cylindrical apex obtuse in shape and <TEX>$10{\sim}20{\times}3{\sim}5\;{\mu}m$</TEX> in size. Appressoria were brown in color, clavate or ovate in shape and <TEX>$6{\sim}18{\times}4{\sim}12\;{\mu}m$</TEX> in size. Optimum temperature for mycelial growth was <TEX>$25{\sim}30^{\circ}C$</TEX>. On the basis of mycological characteristics and pathogenicity test on host plants, the fungus was identified as Colletotrichum gloeosporioides (Penz.) Penz. & Sacc.. This is the first report on the anthracnose of blueberry (Vaccinium spp.) caused by C. gloeosporioides in Korea.

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