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Physiological Specialization of Fusarium oxysporum f. sp. lactucae, a Causal Organism of Fusarium Root Rot of Crisp Head Lettuce in Japan

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In 1995, Fusarium root rot of crisp head lettuce, caused by Fusarium oxysporum f. sp. lactucae, was simultaneously found in the Shiojiri and Kawakami areas of Nagano Prefecture, Japan. The Shiojiri and Kawakami isolates differed in pathogenicity to lettuce cultivars. Because of this distinct physiological specialization, these Shiojiri and Kawakami isolates should be designated as race 1 and race 2, respectively, using lines VP1010 (highly resistant to race 1), VP1013 (highly resistant to race 2) and variety Patriot (highly susceptible to both races) as differential varieties. This is the first report of races of Fusarium oxysporum f. sp. lactucae,

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Received 21 September 2000/ Accepted in revised form 21 March 2001

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FUJINAGA, M., OGISO, H., TSUCHIYA, N. et al. Physiological Specialization of Fusarium oxysporum f. sp. lactucae, a Causal Organism of Fusarium Root Rot of Crisp Head Lettuce in Japan. J Gen Plant Pathol 67, 205–206 (2001). https://doi.org/10.1007/PL00013012

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  • DOI: https://doi.org/10.1007/PL00013012

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