Abstract
Platanus × acerifolia is used as an urban shade tree in many cities throughout Argentina. In late autumn and winter of 2023, leaves and fruits of P. × acerifolia showing typical symptoms of a powdery mildew were collected along the main streets of Tucumán, Argentina. Its morphology and comparison with published descriptions allowed us to identify the fungus as the asexual morph of Erysiphe platani. The specimens were heavily hyperparasitized by Ampelomyces quisqualis, a mycoparasitic ascomycete, used as a natural biological control of the development of powdery mildew species. This work reports the natural occurrence of Ampelomyces in urban environments in Argentina. The disease symptoms and morphological characteristics of the powdery mildew anamorph and the mycoparasite are described and illustrated.
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics
Reference10 articles.
1. Braun, U. & Cook, R. T. A. (2012). Taxonomic Manual of the Erysiphales (Powdery Mildews). CBS Biodiversity Series No. 11.
2. Braun, U., Kiehr, M. & Delhey, R. (2000). Some new records of powdery mildew fungi from Argentina. Sydowia 53 (1): 34-43.
3. Heluta, V. P., Korytnianska, V. G. &, Akata, I. (2013). Distribution of Erysiphe platani (Erysiphales) in Ukraine. Acta Mycologica 48 (1): 105-112.
4. Kirschner, R. (2011). Observations on Erysiphe platani in Germany. Plant Pathology & Quarantine 1 (2): 115-119.
5. Kiss, L. (1998). Natural occurrence of Ampelomyces intracellular mycoparasites in mycelia of Powdery Mildew fungi. New Phytologist 140: 709-714.