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Efficacy evaluation of copper formulations for the control of lettuce downy mildew (Bremia lactucae)

Gengotti, S; Tommasini, M.G.; Antoniacci, L and Bugiani, R (2008) Efficacy evaluation of copper formulations for the control of lettuce downy mildew (Bremia lactucae). Poster at: Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.

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Summary

A four-year field trial was run to determine the effectiveness of copper fungicides and foliar fertilizers in controlling lettuce downy mildew (Bremia lactucae Regel) in Italy’s Emilia-Romagna Region. The experimental design was randomized blocks with 4 replicates using the highly susceptible Camaro cultivar. Eleven different fungicide formulae and foliar fertilizers with low copper concentration were compared. Tribasic copper sulphate (Cuproxat S.D.I.), copper sulphate (Poltiglia Caffaro 20) and copper oxychloride (Pasta Caffaro Nc) exhibited the best control; the effects of pentahydrate sulphate (Kay Tee) and hydroxyde (Kocide 2000) were less consistent. Hydroxide sulphate (Poltiglia disperses), tribasic sulphate (Cuproxat liquido) and the Special Kopper were less effective. The action of the foliar dressings Kendal TE, Fertileader rame and Labicuper showed the most promising results. The only non-copper-based alternative product, grapefruit seed extract, or DF 100 V, proved to be ineffective. Some of the tested foliar sprays were thus as effective as some copper-based fungicides and released less copper into the environment.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:lettuce, downy mildew, Bremia lactucae, copper, natural compounds
Subjects: Crop husbandry > Crop health, quality, protection
Research affiliation: International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 2.6 Crop health and weed management
Deposited By: Tommasini, Dr M.Grazia
ID Code:12654
Deposited On:30 Sep 2008
Last Modified:12 Apr 2010 07:36
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:This paper is published in the conference proceedings:
Neuhoff, Daniel; Halberg, Niels; Alfldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lck, Lorna; Carporali, Fabio; Jensen, Henning Hgh; Migliorini, Paola and Willer, Helga, Eds. (2008) .Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 . 20 June 2008 in Modena, Italy.. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674

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