Control of Downy Mildew, Plasmopara viticola (de Bary) Berlese et de Toni, on Grapevine Leaves through Water Extracts from Composted Organic Wastes |
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| Authors: | H C Weltzien N Ketterer |
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| Institution: | Institut für Pflanzenkrankheiten der Rheinischen Friedrich-Wilhelms-Universität, Nußallee 9, 5300 Bonn 1 (F.R.G.). |
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| Abstract: | Watery extracts of composted manure-straw-soil mixtures induced increased resistance of grapevine leaves against downy mildew, Plasmopara viticola, if applied by dipping or spraying. The extracts had no direct fungicidal or fungitoxic effects. |
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