A new aggressive strain of Verticillium albo-atrum in Verticillium resistant cultivars of tomato in the Netherlands |
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| Authors: | S J Paternotte H A Van Kesteren |
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| Institution: | (1) Glassouse Crops Research Station, P.O. Box 8, 2670 AA Naaldwijk, the Netherlands;(2) Plant Protection Service, P.O. Box 9102, 6700 HC Wageningen, the Netherlands |
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| Abstract: | In 1991 serious losses caused byVerticillium wilt were found on two holdings in the Westland glasshouse district in the Netherlands in which theVerticillium resistant tomato cultivars Calypso and Criterium were grown in soilless systems. Isolates from diseased plants were identified asVerticillium albo-atrum.In inoculation experimentsVerticillium resistant tomato cultivars were seriously affected by the new isolates but not by a control isolate. Moneydor, a susceptible cultivar without the Ve gene, was the most seriously diseased by all isolates. The isolates from theVerticillium resistant tomato cultivars were less virulent on the susceptible cultivar than the control isolate. |
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| Keywords: | Lycopersicon esculentum resistance |
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