Abstract
The distribution of Fusarium moniliforme SHELDON var. subglutinans WOLLENW. et REINKING was investigated by means of the bark-washing method, the spore-trapping from the air, and isolation from Ryukyu pine (Pinus luchuensis MAYR) and sugar cane (Saccharum officinarum L.) tissues. F. subglutinans has been found in Tatsugo-cho, Kasari-cho, and Nase-shi on Amamioshima Island and Kamo-cho, Kedoin-cho, Tsuruta-cho, Hishikari-cho, and Kirishima-cho in southern mainland Kyushu. The colony numbers of F. subglutinans detected differed remarkably between investigation years. No conidium of F. subglutinans have been detected in the air in southern Kyushu. More colonies have been detected in needles than in stems and branches of healthy pines. It also has been isolated from sugar cane on Amamioshima Island. Those isolates from Ryukyu pine in Tatsugo-cho had severe pathogenicity against Pinus spp. They caused damping off of Ryukyu, Virginia (P. virginiana MILL.), and Monterey (P. radiata D. DON) pine seedlings, twig blight of Ryukyu and slash (P. elliottii ENGELM. var. elliottii) pines and stem canker of Ryukyu and Japanese black (P. thunbergii PARL.) Pines. Isolates from Japanese red pine (P. densiflora SIEB. et Zucc.) in Kirishima-cho killed branches of Ryukyu pine.
