Abstract

Five treatments (triadimefon, wettable sulfur, sulfur dust, water, and an unsprayed control) in combination with four temperatures (19, 22, 26, and 30 C) and two grape cultivars (Vitis vinifera cvs. Carignane and Chardonnay) were examined for their effect on sporulation of Uncinula necator, the cause of grape powdery mildew. Fungicides and water were applied on the seventh day after inoculation of cultivars with individual conidia. The numbers of conidia produced from the developing colonies were determined 10 and 15 days after inoculation (.)

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