Resistance analysis of Chinese cabbages to Plasmodiophora brassicae based on early infection in roots Systemic Resistance Induced by Fluoro-substituted Benzothiadiazole Derivatives Against Plasmodiophora brassicae in Chinese Cabbage Inheritance of Resistance to Clubroot Disease in Cabbage Inheritance of Resistance to Clubroot Disease in Cabbage Pathogenic infection of the secondary zoospores of Plasmodiophora brassicae Woron Systemic Resistance Induced by Fluoro-substituted Benzothiadiazole Derivatives Against Plasmodiophora brassicae in Chinese Cabbage