First report of powdery mildew of rainforest spinach ( Elatostema reticulatum ), native to Australia, caused by Podosphaera xanthii

摘要

Powdery mildew-infected rainforest spinach (Elatostema reticulatum) plants were found in Queensland, Australia. Based on morphology and nrDNA ITS sequence analyses, the pathogen was identified as Podosphaera xanthii, a powdery mildew species with a worldwide distribution and a broad host range. This is the first record of P. xanthii infecting E. reticulatum, and the first powdery mildew infection recorded for this native Australian plant.