Incidence of Verticillium wilt of artichoke in eastern Spain and role of inoculum sources on crop infection |
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Authors: | J Armengol M Berbegal A Giménez-Jaime S Romero R Beltrán A Vicent A Ortega J García-Jiménez |
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Institution: | (1) Instituto Agroforestal Mediterráneo, Universidad Politécnica de Valencia, 46022 Valencia, Spain;(2) Escuela Politécnica Superior de Orihuela, Dpto. de Producción Vegetal y Microbiología, Universidad Miguel Hernández, Ctra. Beniel km 3.2, 03312 Orihuela, Alicante, Spain |
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Abstract: | Surveys of 94 artichoke fields throughout the artichoke production areas of Comunidad Valenciana (eastern Spain) were conducted
from 1999 to 2002 to determine the incidence and distribution of Verticillium wilt.Verticillium dahliae was isolated from 80.9% of the sampled fields, and detected in all artichoke-growing areas, with a mean disease incidence
of 53.8% infected plants. The disease was found to cause severe damage to cv. ‘Blanca de Tudela’, which is the most important
artichoke cultivar grown in Spain, and was also observed on the seed-propagated cv. ‘Imperial Star’. In field trials to study
the role of infected planting material and soil inoculum on infection of artichoke plants during the cropping season,V. dahliae was transmitted from infected stumps to the plants, confirming that the use of infected stumps could have greatly contributed
to the dissemination of the pathogen. Inoculum density ofV. dahliae in soil had an effect on crop infection, in that a higher number of microsclerotia per gram of soil resulted in a higher
percentage of infected plants. In addition, yield of cv. Blanca de Tudela was significantly affected byV. dahliae infection, showing that a higher percentage of infection corresponded with lower yield.
http://www.phytoparasitica.org posting July 21, 2005. |
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Keywords: | Artichoke stumps Cynara cardunculus var scolymus soilborne diseases Verticillium dahliae |
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