2015 Volume 19 Issue 3 Pages 133-138
In August 2012, leaf blight and shoot dieback with many conidiomata on Eucalyptus pulverulenta were observed on eucalypti trees in Wakayama Prefecture. The monoconidial isolate was established by a conidium formed in the conidiomata on the leaf lesion. According to the results of inoculating intact leaves of E. pulverulenta and E. gunnii with conidial suspension prepared from the isolate, the same symptoms were developed in these leaves and the fungus was re-isolated from symptomatic tissues. So its pathogenicity was confirmed. Based on the morphological characters and the nucleotide sequences of rDNA ITS regions and β-tubulin gene, the causal fungus was identified as Pseudoplagiostoma eucalypti. This isolate grew at 15-35°C, with optimal growth at 25-30°C.