Abstract
In 1977, natural infection of bamboo and bamboo grass (12 species or varieties in 6 genera) by Pyricularia sp. was found in the different localities of Shimane Prefecture in Japan. The fungus on them was morphologically indistinguishable from P. oryzae and P. grisea. Pyricularia isolate from bamboo infected its own host, rice (Aichiasahi and Shin No.2) and other grasses.