http://orgprints.org/13659/ Pathogenicity in Verticillium on strawberry plants Schubert, P. Golldack, J. Schwärzel, H. Lentzsch, P. Crop health, quality, protection Fruit and berries In the most common strawberry cv. ’Elsanta’, Verticillium infection can lead to rapid wilt and even death of plants. It is known, that a dead plant can be located directly beside vital ones. In a survey of 8 fields in Brandenburg, Mecklenburg- Vorpommern, Sachsen-Anhalt and Sachsen, 432 genotypes of Verticillium dahliae Kleb. were isolated from wilted and even vital plants from 8 fields and classified by PCR-fingerprints. For strawberries, the genotypes can be classified as apathogenic, weakly and highly pathogenic according to the results of climate chamber experiments on strawberry transplants. At landscape scale, similarity analysis of the PCR fingerprints of 432 genotypes resulted in 13 genetic subtypes. Several of these subtypes occurred at all fields, whereas 1 subtype was found in one location only. At field scale, 2 to 11 different subtypes per field were observed. Vital plants were colonised by up to 9 subtypes, wilted plants by up to 11 subtypes. Population structure of Verticillium subtypes is different between vital and wilted plants, the same subtypes can occur in either plant group. In our plot experiments, wilt symptoms could be reduced by changing the Verticillium population structure in the plant. Inoculation of plants with a mixture of three Verticillium genotypes sustained plant vitality over a period of 15 months (WO 2007/051654). Boos, Markus 2008 Conference paper, poster, etc. NonPeerReviewed application/pdf http://orgprints.org/13659/1/138-143.pdf Schubert, P.; Golldack, J.; Schwärzel, H. and Lentzsch, P. (2008) Pathogenicity in Verticillium on strawberry plants. Ecofruit - 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing, Weinsberg/Germany, Staatliche Lehr- und Versuchsanstalt für Obst- und Weinbau in Weinsberg (Baden-Württemberg), Germany, 18.02.2008 - 20.02.2008. In: Boos, Markus (Ed.) Ecofruit - 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 18thFebruary to 20th February 2008 at Weinsberg/Germany, pp. 138-143. http://orgprints.org/13659/http://orgprints.org/13659/1/