http://orgprints.org/12483/ Optimisation of downy mildew (Plasmopara viticola) control in organic viticulture with low copper doses, new copper formulations and plant strengtheners, results of four years of on farm research In three different wine growing regions in Germany, due to weather and infection conditions several fungicide (copper formulations) and plant strengtheners (Myco-Sin VIN®, Kendal®, Frutogard ®) applications against downy mildew are required in order to obtain satisfactory disease control. Results of the four years of on farm trials confirmed good efficacy of the copper based substances like copper hydroxide, partly in combination with two or three applications of potassium phosphonate, new copper-hydroxide formulation or copper oxychloride used in a low doses of copper and alternative products like Myco-Sin-VIN® (clay with high aluminium content) in combination with Kendal® ( plant extract). Hofmann, U. Heibertshausen, D. Baus-Reichel, O. Berkelmann-Loehnertz, B. 8planthealth de-boel-pflanze-pflanzenschutz zother4 int-conf-owc-2008 Optimisation of downy mildew (Plasmopara viticola) control in organic viticulture with low copper doses, new copper formulations and plant strengtheners, results of four years of on farm research 2009-02-05 Hofmann, U.; Heibertshausen, D.; Baus-Reichel, O. and Berkelmann-Loehnertz, B. (2008) Optimisation of downy mildew (Plasmopara viticola) control in organic viticulture with low copper doses, new copper formulations and plant strengtheners, results of four years of on farm research. Organic wine and viticulture conference, Levizzano near Modena, Italy, June 16 and 17, 2008. application/pdf