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Regulierung der Krautfäule(Phytophthora infestans) mit reduzierten Kupfer-Aufwandmengen im Kartoffelanbau

Wohlleben, S. and Bartels, G. (2005) Regulierung der Krautfäule(Phytophthora infestans) mit reduzierten Kupfer-Aufwandmengen im Kartoffelanbau. [Control of late blight (Phytophthora infestans) with reduced dose rates of copper in potatoes.] In: Heß, J and Rahmann, G (Eds.) Ende der Nische, Beiträge zur 8. Wissenschaftstagung Ökologischer Landbau, kassel university press GmbH, Kassel.

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Summary

Four field experiments were conducted in 2004 to analyse the efficacy of reduced rates of copper fungicides against Phytophthora infestans (3 x organic and 1 x conventional growing). Copper (Cu-hydroxide, Cu-oxychloride or Cu-octanoate) was sprayed in a weekly routine or according to the decision support system SIMPHYT with total dosages ranging from 0.57 kg/ha to 4.0 kg/ha. The results revealed in almost all treatments a significant reduction of late blight, except for the lowest rates (e.g. 4 x 0.14 kg/ha Cu as Cu-octanoate or 6 x 0.15 kg/ha Cu as Cu-hydroxide). There was a clear dose-response relation between increasing rates of copper and control of late blight in each experiment. Marketable yields varied from 132 dt/ha to 238 dt/ha in organic field trials depending on trial site and copper treatment. Generally, an effect of copper treatment and late blight on yield could be shown. Even a slight reduction of P. infestans increased yield by 10 % to 20 %. The influence of copper dosage on late blight was more obvious than influence of copper spraying on yield. A dropleg spraying system (copper application within the crop canopy) which was tested on one trial site did not improve blight control compared to conventional application.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Potatoes, Late blight, Phytophthora infestans, Copper, BÖL, BOEL, FKZ 03OE553
Subjects: Crop husbandry > Crop health, quality, protection
Research affiliation: International Conferences > 2005: Scientific Conference on Organic Agriculture
Germany > Federal Research Centre for Cultivated Plants - JKI > Institute for Biological Control
Related Links:http://www.bundesprogramm-oekolandbau.de, http://www.bundesprogramm.de/fkz=03OE553, http://orgprints.org/perl/search/advanced?addtitle%2Ftitle=&keywords=03OE553&projects=BOEL&_order=bypublication&_action_search=Suchen
Deposited By: Wohlleben, Dr. Stefan
ID Code:3585
Deposited On:05 Mar 2005
Last Modified:12 Apr 2010 07:29
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted

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