A preliminary report on a Peridermium species found on Pinus pumila Regel in Japan

Abstract

A hithcrto unrecorded Periderminm spccies was found on shoots of Pinus pumila Regel in Hokkaido, Japan. The rust has unbranched and uninucleate germ tubes with pointcd tips. Alternate host plants have not been found. The rust is considered to be a pine‐to‐pine species.

White pine blister rust in Korea, Japan and other Asian regions: comparisons and implications for North America

“…An unexpected discovery was the existence of a blister rust fungus in Hokkaido and northern Japan— Peridermium yamabense Saho and I. Takah.—that spread directly from one P. pumila tree to another (S aho and T akahashi 1976; S aho 1981, 1987). Evidence for an autoecious (pine‐to‐pine) life cycle was first provided by an injection inoculation method used on several white pine species, including P. strobus (S aho 1984).…”