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Mean score indicating the severity of clubroot infection in Chinese cabbage cultivar “Bullam-3-ho” at 28 and 35 days after inoculation (DAI) in response to infection with four different Korean P. brassicae isolates. Data represent the average disease scores of 10 plants ± standard error. Values with different letters are significantly different at 5% level of significance according to Tukey’s pairwise comparisons.
