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First found of Erysiphe elevata on Eucalyptus camaldulensis and Phyllactinia lagerstroemiae sp. nov. on Lagerstroemia from Thailand.

Meeboon, J. ; Takamatsu, S.

Mycoscience 2017 Vol 58 No. 4 pp. 253-260;

Abstract

A new powdery mildew record and a new species from Thailand are reported in this paper. A fungus found on Eucalyptus camaldulensis has an internal transcribed spacer (ITS) sequence identical to Erysiphe elevata recorded on Catalpa spp. in North America and Europe. Conidia produced singly with Pseudoidium-type germ tubes, and kinked foot cells of conidiophores are also consistent with the morphology of asexual stage of E. elevata. This is the first record of E. elevata on Eucalyptus and from Asia. A new species Phyllactinia lagerstroemiae is proposed for the fungus found on Lagerstroemia spp. based on combinations of morphological data and molecular phylogeny inferred from ITS and 28S rRNA gene sequences.