Formation in Culture of Cochliobolus miyabeanus, the Perfect State of Helminthosporium oryzae

Abstract

Cochliobolus miyabeanus, perfect state of Helminthosporium oryzae, has been produced in culture by certain crosses. Media and methods for formation of the perfect state are described. In routine experiments, the authors employed Sachs agar medium plus rice straw at the constant temperature of 24C for 25-30 days. Morphological data have concurred with the original data of Ito and Kuribayashi (1927, 1931), with the one exception of the length of the ostiolar beak.