Sporulation of Pyricularia spp. on detached leaves of gramineae and in media supplemented with leaf extracts

Abstract

Except for the isolate fromS. italica, all other isolates of Pyricularia sporulated best on detached injured leaves ofT. vulgare andS. italica as compared to their natural host leaves in light. The observed results are ascribed to heterokaryosis and production/selection of sporulating biotypes rather than to the stimulation of sporulationper se of the isolates by special pre- or post-inoculation compounds in the detached leaves.