Abstract
Forest green mold incidence rate, extent of damage according to the inoculation periods, and its cultural characteristics were observed in the automatic cultural system of the winter mushroom, Flammulina velutipes. The incidence rate of the forest green mold was 7.7% in early cultivation stage and slowly increased to 14.9% in harvest stage. When the forest green mold was inoculated at cultural period, the rate was recorded at 100%, but the extent of the damage increased up to 40% (+++). There was also 100% incidence rate at early pinheading time, whereas the yield of mushroom decreased to ++ $(10{\sim}39%)$. The rate of forest green mold was greatly decreased to 34.4% at 10 days after pinheading, and its damage extent was also below 10%. A pathogen to infect the winter mushroom was identified as Trichoderma pseudokoningii. It's optimum temperature for mycelial growth is $25^{\circ}C$, and it grew 2.6 times faster than that of F. velutipes. The mycelial color of T. pseudokoningii was pale yellow or olivaceous in shades on PDA medium. Phialospore was one celled, and ellipsodal or obovoid, smooth walled, and measured $1.3{\sim}3.0{\times}1.0{\sim}2.5\;{\mu}m$. It aggregated in small heads at the tips of the phialides. The phialides were $3.2{\sim}9.2{\times}2.0{\sim}5.5\;{\mu}m$ and were of bowling pin type, solitary and alternate or more irregularly disposed at the conidiophore apex, T. pseudokoningii depressed the F. velutipes growth at the crossing cultivation when they were simultaneously. FV 4-1 (F. velutipes) cultivar was less depressed by T. pseudokoningii, but had a lower cross growth rate than the other four cultivars.
자동화 시설내에서 재배되는 팽이버섯에 발생하는 푸른곰팡이병의 발생상황, 병원균 접종시기에 따른 피해정도, 병원균의 배양적 특성 및 팽이버섯 품종별 피해정도 등에 관한 연구를 수행하였다. 팽이버섯 재배시기별 푸른곰팡이병의 발병률을 배양병수(PP병)로 조사한 바, 배양기에 7.7%로 가장 높았으며, 그후 각 재배단계별로 약간씩 증가하여 수확기까지는 14.9%를 나타냈다. 접종시기에 따른 피해정도는 배양기에 접종시 100%의 감염률을 나타냈으며, 피해정도로 구분하면 +++(40% 이상 수량감소)이었고, 발이초기에는 100%의 이병률을 나타냈지만 피해정도는 감소하여 ++($10{\sim}39%$ 수량감소)를 나타냈으며, 발이 10일후에는 34.4%의 이병률과 피해도는 10% 이하로 푸른곰팡이병이 팽이버섯 발병에 끼치는 영향이 매우 컸다. 팽이버섯에 푸른곰팡이병을 일으키는 병원균은 Trichoderma pseudokoningii로 동정되고, 이 균은 $25^{\circ}C$에서 균사생육이 왕성하며, 팽이버섯 균사보다 2.6배의 빠른 균사생장을 나타냈다. PDA배양시 균총의 색은 황록색을 띄며, phialospore는 한 개의 세포로 레몬형, 표면은 매끈하였고, 크기는 $1.3{\sim}3.0{\times}1.0{\sim}2.5\;{\mu}m$였다. phialides는 볼링핀과 유사한 $2{\sim}3$개가 뭉쳐서 분생자병에 붙어있으며, 크기는 $3.2{\sim}9.2{\times}2.0{\sim}5.6\;{\mu}m$이었다. 계통에 따른 푸른곰팡이병 피해도는 팽이버섯 5개 계통중 FV 4-1계통이 다른 계통보다 교차생장률이 낮고 T. psedokoningii에 의한 생장억제 정도가 낮았다.
