7Strelkov S E, Tewari J P, Smith D E. Characterization of Plasmodiophora brassicae populations from Alberta, Canada [J]. Canadian Journal of Plant Pathology, 2006,28 : 467 - 474.
8Tewari J P, Strelkov S E, Orchard D, et al. Identification of clubroot of crucifers on canola (I3rassica napus ) in Alberta [J]. Canadian Journal of Plant Pathology, 2005,27 : 143 - 144.
9Geoffrey R D. Plasrnodiophora brassicae in its environment [J]. Journal of Plant Growth Regulation,2009, 28:212 - 228.
10Donald C, Porter I. Integrated control of clubroot [J]. Journal of Plant Growth Regulation, 2009,28 : 289 - 803.