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Viruserkrankungen in Möhren - gegenwärtige Probleme und verfügbare Nachweismethoden

Fittje, Susanne; Menzel, Dr. Wulf; Saucke, Dr. Helmut and Vetten, Dr. Heinrich-Josef (2005) Viruserkrankungen in Möhren - gegenwärtige Probleme und verfügbare Nachweismethoden. [Virus diseases in carrots – current status and diagnostic methods.] 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

An apparently new virus disease of carrots (Daucus carota) has gained increasing importance in Germany. The complex of symptoms consisting of leaf reddening, plant stunting, hairy and rat tailed roots is thought to be caused by viral infections. Particularly the main carrot growing areas in Lower Saxony are adversely affected. In field surveys in 2003 about 30 % symptomatic plants were observed with average weight losses of about 30 %. In severe cases symptom-related yield reduction was estimated to be 17 % on-farm, which corresponded to a monetary loss of up to 600 €/ha. In 2004 up to 6 % of the plants displayed virus like symptoms. Varietal differences in susceptibility were observed. In general, late maturing varieties for processing showed more symptoms than early maturing fresh market varietes. However, this was not consistent in all cases.
At present eight different carrot viruses have been isolated and partially characterized. Antisera to Carrot yellow leaf virus (CYLV, Closterovirus), Carrot thin leaf virus (CTLV, Potyvirus), Carrot red leaf virus (CtRLV, Luteovirus), and the Anthriscus strain of Parsnip yellow fleck virus (PYFV, Sequivirus) are now commercially available for serological analysis of carrot samples. Our provisional experimental data indicate that CtRLV is highly variable and the causal agents typically associated with the carrot motley dwarf (CMD) disease complex may differ in Germany from those reported in the literature. Further analyses of single and multiple infections with their corresponding symptoms under controlled conditions will be necessary to identify the relevant environmental conditions leading to economic losses.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Möhren, Viruserkrankungen, Ertrag, Sortenanfälligkeit, BÖL, BOEL, FKZ 02OE253
Subjects: Crop husbandry > Crop health, quality, protection
Knowledge management > Research methodology and philosophy > Specific methods
Crop husbandry > Production systems > Vegetables
Research affiliation: International Conferences > 2005: Scientific Conference on Organic Agriculture
Germany > University of Kassel > Department of Ecological Plant Protection
Germany > Federal Research Centre for Cultivated Plants - JKI > Institute for Biological Control
Related Links:http://www.bundesprogramm-oekolandbau.de, http://www.bundesprogramm.de/fkz=02OE253, http://orgprints.org/perl/search/advanced?addtitle%2Ftitle=&keywords=02OE253&projects=BOEL&_order=bypublication&_action_search=Suchen
Deposited By: Saucke, Dr. Helmut
ID Code:3785
Deposited On:05 Mar 2005
Last Modified:12 Apr 2010 07:30
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted

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