31. ストローブマツで発見されたScleroderris Lagerbergii GREMMEN(会員研究発表講演)

抄録

In 1973, severe damage of planted Pinus strobus by an ascomycetous fungus was found in Tokyo University Forest, in Hokkaido, Japan. Apothecia and pycnidia were recognized on bark of dead branches and canker of the pine. This fungus was identified as Scleroderris lagerbergii GREMMEN Comparisons among specimens on Abies sachalinensis collected by YOKOTA, and by SAHO and author, and those on Pinus resinosa sent from DORWORTH, and those on P.strobus were made. In the perfect state, there were no clear defferences among them. But, conidia on P.strobus are mostly sickle-shaped, one to four celled, 32.0-3.0μ in average. On the contrary, conidia on Abies sachalinensis were sickle-sickle-shaped, four eight celled, 46.1-3.1μ. Therefore, the fungus on planted Pinus strobus may be another stain within S.lagerbergii, the same as the fungus reported by DORWORTH, ETLLINGER and GREHMN.