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Saatgut-Testmethoden für Falschen Mehltau an Feldsalat

Schärer, Hansjakob; Penzkofer, Lena; Reents, Hansjürgen and Brändle, Frank (2009) Saatgut-Testmethoden für Falschen Mehltau an Feldsalat. Poster at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.

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PDF (Poster)


Peronospora valerianellae is one of the most important pathogens of corn salad. It is
seedborne and besides seed treatments there is no possibility to control the disease.
The wash-off-test and the grow-out-test are currently in use to test seed lots for the
presence of the pathogen. Despite these test methods, there are still seed lots that
show infected plants during production of corn salad. This indicates that a low
infection rate of a seed lot (< 0.25% - 1%) may lead to serious problems in grower’s
production units. To allow an improved identification of seed lots with low infection
rate, a specific PCR-based detection method for P. valerianellae was developed.
Three test methods were compared for their efficacy to detect contaminated seed lots.
Six out of seven seed lots not showing contamination in the standard grow-out test
were identified as contaminated. With an extended grow-out test, it was possible to
confirm these results from the PCR-test. The PCR based test for P.valerianellae on
seed offers the possibility to detect the pathogen below the actual detection limits.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Seed-testing methods, seedborne pathogens, Peronospora valerianellae, Valerianella locusta, PCR-detection, sustainability assessment
Subjects: Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Plant Protection and Biodiversity
International Conferences > 2009: Scientific Conference on Organic Agriculture > Pflanze und Boden > Pflanzengesundheit
Related Links:http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37
Deposited By: Schaerer, Dipl.Ing.Agr. Hans-Jakob
ID Code:14490
Deposited On:14 Apr 2009
Last Modified:17 Apr 2015 10:53
Document Language:German - Deutsch
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen:
Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement
Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel.
Verlag Dr. Köster, Berlin.
Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37

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