Eight cultivars of Chinese cabbage were tested for their root invasion, latent infection, and wound infection by Erwinia carotovora subsp. carotovora, the pathogen of soft rot disease, in the lab and fields. Three criteria with 7 parameters were established for evaluating the cultivar resistance to the disease, and expressed as resistance to root invasion, to latent infection and to wound infection resp. The measured values of the seven parameters were separately divided into 5 grades from higher to lower (...
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