Occurrence of Stem Blight of Tulip by Fusarium roseum f. sp. cerealis ‘Avenaceum’ in Japan

Abstract

Stem blight of tulip in Japan was first found in Toyama Prefecture in late-April, 1982. The diseased plants stagnated and their stems were covered with light pink mycelia in which orange sporodochia appeared. A Fusarium fungus isolated from the diseased plants was proved to be causal agent of the disease and it also showed pathogenicity to barley in inoculation tests. The causal fungus was identified with Fusarium roseum f. sp. cerealis ‘Avenaceum’ by its morphological characteristics.