Abstract
Boring of Platypus quercivorus in Quercus crispula, Q. serrata, and Castanea crenata trees and mortality of the bored trees were investigated at a newly damaged forest by the beetle in Kyoto Prefecture. Rate of trees bored by the beetle was high on the larger trees of both Q. crispula and Q. serrata, and the density of the entry holes was also high on these trees. However, the mortality of the bored trees was higher on Q. crispula than Q. serrata. The bored trees were concentrated at the area where thinning had been done. At the thinning area, the range between the highest and the lowest daily temperature was large, and the air humidity was low.
