Disease Note.

First Report of Oidium mangiferae on Mangifera indica in Greece. V. A. Bourbos and M. T. Skoudridakis. National Agricultural Research Foundation, Subtropical Plants and Olive Trees Institute of Chania, Laboratory of Plant Pathology, 73100 Chania, Crete, Greece. Plant Dis. 79: 1075, 1995; published on-line as D-1995-0821-OlN, 1995. Accepted for publication 28 July 1995.

Immature leaves of 3-year-old mango trees (Mangifera indica L. cv. Haden) imported from Israel and growing in a greenhouse in Crete, Greece, were found to be infected by the fungus Oidium mangiferae Berthet, in June 1994. The perfect stage of the fungus was not found. The conidia were aseptate, hyaline, elliptical to barrel-shaped, 35 to 42 x 20 to 28 pm, and did not contain fibrosine bodies. Conidia were produced in chains from single conidiophores. The infected leaves showed leaf curl symptoms. In warm, dry weather, the upper leaf surfaces were covered irregularly by a fine farinaceous mildew that could be removed by rubbing, resulting in a bluish to dark-colored surface. Occasionally, small lesions were surrounded by brown halos. When infection was severe, the lesions coalesced and a significant part of the leaf surface was dried. Old leaves were not infected. This is the first report of powdery mildew on mango in Greece.