Races of Sphaerotheca fuliginea infecting cucurbits in India and host differentials for their identification
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Authors
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M. WAJID KHAN and G.K. SHARMA
Plant Pathology and Plant Nematology Laboratories, Department of Botany, Aligarh Muslim University, Aligarh 202 002
Keywords:
Powdery mildew, races, cucurbits, host differentialsAbstract
Analysis of a large number of isolates of Sphaerotheca fuliginea collected from different cucurbits showed occurrence of three races in most of the agro-ecological zones of India. Race 3 was most widespread and infected most of the cultivated cucurbits in the states. Race 2 was restricted to green melon, Citrullus vulgaris var. fistulosus and race 1 to spongegourd, Luffa cylindrica. In addition, race 1 infected a few other cucurbits. L. cylindrica, C. vulgaris var. fistulosus and Cucumis sativus are proposed as differential hosts for identification of the three races of S. fuliginea isolated from cucurbits.
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