Clubroot of cruciferous crops - New perspectives on an old disease

Canadian Journal of Plant Pathology

Volumn 32, Issue 1, 2010, Pages 43-57

  Howard, Ronald J ^a   Strelkov And, Stephen E ^b   Harding, Michael W ^a  

^a ALBERTA AGRICULTURE AND RURAL DEVELOPMENT   (Canada)

^b UNIVERSITY OF ALBERTA   (Canada)

Author keywords

Brassica; Canola; Clubroot; Cole crop vegetables; Crucifers; Disease management; Disease spread; Plasmodiophora brassicae

Indexed keywords

BRASSICA; BRASSICA NAPUS; BRASSICA NAPUS VAR. NAPUS; BRASSICACEAE; PLASMODIOPHORA; PLASMODIOPHORA BRASSICAE;

EID: 77955197946     PISSN: 07060661     EISSN: None     Source Type: Journal    
DOI: 10.1080/07060661003621761     Document Type: Conference Paper

References (112)

1. ABBASI, P.A., & LAZAROVITS, G. (2006). Effect of soil application of AG3 phosphonate on the severity of clubroot of bok choy and cabbage caused by Plasmodiophora brassicae. Plant Dis., 90, 1517-1522.
2. AGRICULTURE AND AGRI-FOOD CANADA (2009). Biocontrol of clubroot on canola - a new initiative. AAFC No. 10876, Cat. No. A52-140/2009EPDF. p. 2.
3. ALBERTA CLUBROOT MANAGEMENT COMMITTEE (2008). Alberta clubroot management plan. AGDEX 140/638-2. Alberta Agriculture and Rural Development. 8 pp. Retrieved from http//wwwl.agric.gov.ab.ca/$Department/deptdocs.nsf/all/ agdexl 1519 [accessed 4 May 2009].
4. AYERS, G.W. (1957). Races of Plasmodiophora brassicae. Can. J. Bot., 35, 923-932.
5. AYERS, G.W. (1972). Races of Plasmodiophora brassicae infecting crucifer crops in Canada. Can. Plant Dis. Surv., 62, 77-81.
6. BÉLEC, C., TREMBLAY, N., & COULOMBE, J. (2004). Liming and calcium cyanamide for clubroot control in cauliflower. Acta Hort., 635, 41-46.
7. BRITISH COLUMBIA MINISTRY of LANDS (2009). Pesticides - new registrations. Retrieved from http://www.al.gov.bc.ca/pesticides/j-3.htm.
8. BUCZACKI, S.T., & OCKENDON, J.G. (1979). Preliminary observations on variation in susceptibility to clubroot among collections of some wild crucifers. Ann. Appl. Biol., 92, 113-118.
9. BUCZACKI, ST., TOXOPEUS, H., MATTUSCH, P., JOHNSTON, T.D., DIXON, G.R., & HOBOLTH, L.A. (1975). Study of physiologic specialization in Plasmodiophora brassicae: Proposals for attempted rationalization through an international approach. Trans. Br. Mycol. Soc., 65, 295-303.
10. CAO, T., MANOLII, V.P., HWANG, S.F., HOWARD, R.J., & STRELKOV, S.E. (in press). Virulence and spread of Plasmodiophora brassicae [clubroot] in Alberta, Canada. Can. J. Plant Pathol.
11. CAO, T., TEWARI, J., & STRELKOV, S.E. (2007). Molecular detection of Plasmodiophora brassicae, causal agent of clubroot of crucifers, in plant and soil. Plant Dis., 91, 60-87.
12. CHEE, H.Y., KIM, W.G., CHO, W.D., JEE, H.J., & CHOI, Y.C. (1998). Detection of Plasmodiophora brassicae Woron. Kor. J. Plant Pathol., 14, 589-593.
13. CHIANG, M.S., CHIANG, B.Y., & GRANT, W.F. (1977). Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. oleracea var. capitata). I. Interspecific hybridization between B. napus and B. oleracea var. capitata. Euphytica, 26, 319-336.
14. CHIANG, M.S., & CRÊTE, R. (1970). Inheritance of clubroot resistance in cabbage (Brassica oleracea L. var. capitata L.). Genome, 12, 253-256.
15. CHIANG, M.S., & CRÊTE, R. (1972). Screening crucifers for germplasm resistance to clubroot Plasmodiophora brassicae. Can. Plant Dis. Surv., 52, 46-50.
16. CHIANG, M.S., & CRÊTE, R. (1985a). Male fertile and male sterile cabbage, broccoli, and cauliflower clubroot resistant breeding lines. HortScience, 20, 457-458.
17. CHIANG, M.S., & CRETE, R. (1985b). Acadie: A clubroot resistant cabbage cultivar. Can. J. Plant Sci., 65, 233-235.
18. CHIANG, M.S., & CRÊTE, R. (1989). Richelain: A clubroot resistant cabbage cultivar. Can. J. Plant Sci., 69, 337-340.
19. CHONG, C., CHIANG M.S., & CRÊTE, R. (1985). Studies on glucosinolates in clubroot resistant selections and susceptible commercial cultivars of cabbages. Euphytica, 34, 65-73.
20. CONNERS, I.L. (1935). Fifteenth annual report of the Canadian plant disease survey. Can. Plant Dis. Surv., 15, 24-44.
21. CONNERS, I.L., & SAVILE, D.B.O. (1944). Twenty-fourth annual report of the Canadian plant disease survey. Can. Plant Dis. Surv., 24, i-v.
22. CONNERS, I.L., SHOEMAKER, R.A., & CREELMAN, D.W. (1956). Thirty-sixth annual report of the Canadian plant disease survey. Can. Plant Dis. Surv., 36, ii-v.
23. CREELMAN, D.W. (1958). Thirty-eighth annual report of the Canadian plant disease survey. Can. Plant Dis. Surv., 38, 48-84.
24. CREELMAN, D.W. (1965). Diseases of vegetable crops. Can. Plant Dis. Surv., 45, 52-63.
25. CREELMAN, D.W. (1967). Summary of the prevalence of plant diseases in Canada in 1965. A Compilation. Can. Plant Dis. Surv., 47, 31-71.
26. CRÊTE, R. (1981). Worldwide importance of clubroot [Brassica]. Clubroot Newsl., 11, 6-7.
27. CRÊTE, R., & CHIANG, M.S. (1967). Screening tests of crucifers for resistance to clubroot in organic soils of Quebec. Plant Dis. Rep., 51, 991-1002.
28. CRETE, R., & CHIANG, M.S. (1980). Screening Brassicas for resistance to clubroot, Plasmodiophora brassicae Wor. Can. Plant Dis. Surv., 60, 17-19.
29. CRÊTE, R., LAUBERTG, J., & JASMIN, J.J. (1963). Lutte chimique contre la hernie, Plasmodiophora brassicae Wor., des crucifere: En sols minkal et organique. Can. J. Plant Set, 43, 349-354.
30. DATNOFF, L.E., KROLL, T.K., & LACY, G.H. (1987). Efficacy of chlorine for decontaminating water infested with resting spores of Plasmodiophora brassicae. Plant Dis., 71, 734-736.
31. DIXON, G.R. (2009). The occurrence and economic impact of Plasmodiophora brassicae and clubroot disease. J. Plant Growth Regul., 28, 194-202.
32. DONALD, E.C., LAWRENCE, J.M., & PORTER, I.J. (2002). Evaluation of a fluorescent staining technique as an indicator of pathogenicity of resting spores of Plasmodiophora brassicae. Austral Plant Pathol., 31, 373-379. (Pubitemid 36425226)
33. ESTEY, R.H. (1994). Essays on the early history of plant pathology and mycology in Canada. Montreal, Québec and Kingston, Ontario: McGillQueen's University Press.
34. FAGGIAN, R., BULMAN, S.R., LAWRIE, A.C., & PORTER, I.J. (1999). Specific polymerase reaction primers for the detection of Plasmodiophora brassicae in soil and water. Phytopathology, 89, 392-397.
35. FAGGIAN, R., PARSONS, S., PORTER, I.J., & LAWRIE, A.C. (2001). Detection of clubroot in Australia: Progress towards a reliable molecular diagnostic assay. In I.J. Porter (Ed.), Proceedings of the 2nd Australasian Soilborne Diseases Symposium. Lome, Australia.
36. FAGGIAN, R., & STRELKOV, S.E. (2009). Detection and measurement of Plasmodiophora brassicae. J. Plant Growth Regul, 28, 282-288.
37. FAYOLLE, L., NOBEL, R., COVENTRY, E., AIME, S., & ALABOUVETTE, C. (2006). Eradication of Plasmodiophora brassicae during composting of wastes. Plant Pathol., 55, 553-558.
38. FINLAYSON, D.G., & CAMPBELL, C.J. (1969). Insecticides, fungicides, and lime combined for control of cabbage maggots, clubroot, and wire stem. J. Entomol. Soc. Brit. Columbia, 66, 14-18.
39. FINLAYSON, D.G., & CAMPBELL, C.J. (1971). Fungicides for preventing clubroot of cauliflower in loam and peat soils. Can. Plant Dis. Surv., 61, 122-126.
40. FRIBERG, H., LAGERLÖF, J., & RAMERT, B. (2005). Germination of Plasmodiophora brassicae resting spores stimulated by a non-host plant. Eur. J. Plant Pathol, 113, 275-281.
41. FRIBERG, H., LAGERLÖF, J., & RÄMERT, B. (2006). Usefulness of nonhost plants in managing Plasmodiophora brassicae. Plant Pathol, 55, 690-695.
42. HARDING, M.W., HOWARD, R.J., MANOLII, V.P., MANOLII, A.V., STRELKOV, S.E., BASU, K., & SPENCER, R.C.J. (2008). Incidence of clubroot on cruciferous vegetables in Alberta in 2007. Can. Plant Dis. Surv., 88, 126-128.
43. HARDING, M.W., HOWARD, RJ., NEESER, C., STRELKOV, S.E., TEWARI, J.P., LISOWSKI, S.L.I., SLOMP, D.L., XUE, S., & SPENCER, R.C.J. (2005). Incidence of clubroot on cruciferous vegetables in Alberta in 2004. Can. Plant Dis. Surv., 85, 98-99.
44. HARDING, M.W., HOWARD, R.J., PUGH, C.A., SNTOER, M.D., DANIELS, G.C., STRELKOV, S.E., & SPENCER, R.C.J. (2009). Incidence of clubroot on cruciferous vegetables in Alberta in 2008. Can. Plant Dis. Surv., 89, 136-139.
45. HARDING, M.W., HOWARD, R.J., XUE, S., STRELKOV, S.E., CHANG, K.F., LISOWSKI, S.L.I., PUGH, S.L., & SPENCER, R.C.J. (2006). Incidence of clubroot on cruciferous vegetables in central Alberta in 2005. Can. Plant Dis. Surv., 86, 116-117.
46. HARDING, M.W., HOWARD, R.J., XUE, S., STRELKOV, S.E., CHANG, K.F., & SPENCER, R.C.J. (2007). Incidence of clubroot on cruciferous vegetables in central Alberta in 2006. Can. Plant Dis. Surv., 87, 132-134.
47. HARLING, R., & KENNEDY, S.H. (1991). Biological control of Plasmodiophora brassicae using a bait crop. Rijksuniversiteit Faculteit Landbouwwetenschappen Gent, 43, 159-170.
48. HILDEBRAND, P.D., & MCRAE, K.D. (1998). Control of clubroot caused by Plasmodiophora brassicae with nonionic surfactants. Can. J. Plant Pathol., 20, 1-11.
49. HONIG, F. ( 1931 ). Der Kohlkropferreger (Plasmodiophora brassicae Wor.). Gartenbauwissenschaft, 5, 116-225.
50. HOWARD, R.J., GARLAND, J.A., & SEAMAN, W.L. (1994). Diseases and pests of vegetable crops in Canada. The Canadian Phytopathological Society and the Entomological Society of Canada.
51. HOWAT, S. (2005). Crop profile for rutabaga in Canada. Pest Management Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario.
52. HWANG, S.F., STRELKOV, S.E., TURNBULL, G.D., MANOLH, V.P., HOWARD, R.J., HARTMAN, M., & LAFLAMME, P. (2008). Soil treatments and amendments for management of clubroot on canola in Alberta [Abstract]. J. Plant Pathol., 90, S2.410.
53. ITO, S., MAEHARA, T., MARUNO, E., TANAKA, S., KAMEYA-IWAKI, M., & KISHI, F. (1999). Development of a PCR-based assay for the detection of Plasmodiophora brassicae in soil. J. Phytopathol., 147, 83-88. (Pubitemid 29373154)
54. KAGEYAMA, K., & ASANO, T. (2009). Life cycle of Plasmodiophora brassicae. J. Plant Growth Regul. doi: 10.1007/s00344-009-9101-z.
55. LANGE, L., HEIDE, M., HOBOLTH, L., & OLSON, L.W. (1989). Serological detection of Plasmodiophora brassicae by dot immunobinding and visualization of the serological reaction by scanning electron microscopy. Phytopathology, 79, 1066-1071.
56. MACFARLANE, I. (1952). Factors affecting the survival of Plasmodiophora brassicae Wor. in the soil and its assessment by a host test. Ann. Appl. Biol., 39, 239-256.
57. MACFARLANE, I. (1970). Germination of resting spores of Plasmodiophora brassicae. Trans. Br. Mycol Soc., 55, 97-112.
58. MANITOBA AGRICULTURE, FOOD and RURAL INITIATIVES (MAFRI) (2009). Clubroot of brassica crops. Retrieved from http://www.gov.mb.ca/agriculture/crops/ diseases/fac63s00.html.
59. MCCARTNEY, H.A., FOSTER, S.J., FRAAUE, B.A., WARD, E. (2003). Molecular diagnosis of fungal plant pathogens. Pest Management Sci., 59, 129-142. (Pubitemid 36152151)
60. MCCURRY, J.B., & HICKS, A.J. (1925). Fifih annual report on the prevalence of plant diseases in the Dominion of Canada. Dominion of Canada Department of Agriculture.
61. MCDONALD, M.R., KORNATOWSKA, B., & MCKEOWN, A.W. (2004). Management of clubroot of Asian Brassica crops grown in organic soils. Acta Hort., 635, 25-30.
62. MORASSE, I., PAGEAU, D., & LAFOND, J. (1997). Attention à la hernie des crucifères dans le canola. Grandes cultures, 7(4), 22-23.
63. MURAKAMI, H., TSUSHIMA, S., KUROYANAGI, Y., & SHISHIDO, Y. (2002). Reduction of resting spore density of Plasmodiophora brassicae and clubroot disease severity by liming. Soil Sci. Plant Nutr., 48, 685-691.
64. NARISAWA, K., OHKI, T. & HASHIBA, T. (2000). Suppression of clubroot and Verticillium yellows in Chinese cabbage in the field by the endophytic fungus, Heteroconium chaetospira. Plant Pathol., 49, 141-146.
65. PAGEAU, D., LAJEUNESSE, J., & LAFOND, J. (2006). Impact de l'hernie des crucifères [Plasmodiophora brassicae] sur la productivité et la qualité du canola. Can. J. Plant Pathol., 28, 137-143.
66. PIONEER HI-BRED (2009). Breakthrough genetic solution for clubroot registered. Retrieved from http://www.pioneer.com/web/site/portal/template. PRINT?print=true [accessed 4 May 2009].
67. RANKIN, W.H., & FRASER, W.P. (1920). Survey of the prevalence of common plant diseases in the Dominion of Canada, 1920, First Annual Report. Ottawa, Ontario: Dominion of Canada Department of Agriculture.
68. REYES, A.A., DAVIDSON, R.T., & MARKS, C.F. (1974). Races, pathogenicity and chemical control of Plasmodiophora brassicae in Ontario. Phytopathology, 64, 173-177.
69. RIMMER, S.R., KUTCHER, H.R., & MORRALL, R.A.A. (2003). Diseases of canola and mustard. In K.L. Bailey, B.D. Gossen, R.K. Gugel, & R.A.A. Morrall (Eds.), Diseases of field crops in Canada (pp. 129-146). Saskatoon, Saskatchewan: Canadian Phytopathological Society.
70. RIMMER, S.R., SHATTUCK, V.I., & BUCHWALDT, L. (2007). Compendium of Brassica diseases. St. Paul, MN: APS Press.
71. ROBAK, J. (1996). The effect of some crop rotations on decrease of clubroot, Plasmodiophora brassicae, in soils. In Brighton Crop Protection Conference: Pests and Diseases, 1996 (pp. 647-651). Farnham, UK: British Crop Protection Council.
72. SEAMAN, W.L., WALKER, J.C., & LARSON, R.H. (1963). A new race of Plasmodiophora brassicae affecting Badger Shipper cabbage. Phytopathology, 53, 1426-1429.
73. SOME, A., MANZANARES, MJ., LAURENS, F., BARON, F., THOMAS, G., & ROUXEL, F. (1996). Variation for virulence on Brassica napus L. amongst Plasmodiophora brassicae collections from France and derived single-spore isolates. Plant Pathol., 45, 432-439.
74. STRELKOV, S.E., MANOLII, V.P., CAO, T., XUE, S., & HWANG, S.F. (2007). Pamotype classification of Plasmodiophora brassicae and its occurrence in Brassica napus in Alberta, Canada. J. Phytopathol., 105, 706-712.
75. STRELKOV, S.E., TEWARI, J.P., HARTMAN, M., & ORCHARD, D. (2005). Clubroot on canola in Alberta in 2003 and 2004. Can. Plant Dis. Surv., 85, 72-73.
76. STRELKOV, S.E., TEWARI, J.P., & SMITH-DEGENHARDT, E. (2006). Characterization of Plasmodiophora brassicae populations from Alberta, Canada. Can. J. Plant Pathol., 28, 461-474.
77. STATISTICS CANADA (2009a). Fruit and vegetable production - June 2009. Catalogue 22-003-X, 78(1).
78. STATISTICS CANADA (2009b). Field crop reporting series - September estimate of production of principal field crops. Catalogue 22-002-X, 88 (1).
79. TAKAHASHI, K. (1994). Influences of some environmental factors on the viability of resting spores of Plasmodiophora brassicae. Ann. Phytopathol. Soc. Japan, 60, 658-666.
80. TAKAHASHI, K., & YAMAGUCHI, T. (1988). A method for assessing the pathogenic activity of resting spores of Plasmodiophora brassicae by fluorescence microscopy. Ann. Phytopathol. Soc. Japan, 54, 466-475.
81. TAKAHASHI, K., & YAMAGUCHI, T. (1989). Assessment of pathogenicity of resting spores of Plasmodiophora brassicae in soil by fluorescence microscopy. Ann. Phytopathol. Soc. Japan, 55, 621-628.
82. TEWARI, J.P., STRELKOV, S.E., ORCHARD, D., HARTMAN, M., LANGE, R.M., & TURKINGTON, T.K. (2005). Identification of clubroot of crucifers on canola (Brassica napus) in Alberta. Can. J. Plant Pathol., 27, 143-144. (Pubitemid 40912632)
83. TOMS, H.N.W. (1966). Estimates of crop losses in the Lower Fraser Valley of British Columbia in 1965. Can. Plant Dis. Surv., 46, 112-114.
84. TOMS, H.N.W. (1968). Estimates of crop losses in the Lower Fraser Valley of British Columbia, 1966. Can. Plant Dis. Surv., 48, 28-31.
85. TREMBLAY, N., BELEC, C., COULOMBE, J., & GODIN, C. (2005). Evaluation of calcium cyanamide and liming for control of clubroot disease in cauliflower. Crop Protection, 24, 798-803.
86. TREMBLAY, N., BÉLEC, C., LAWRENCE, H., & CARISSE, O. (1999). Clubroot of crucifers - control strategies. Saint-Jean-sur Richelieu, PQ: Agriculture and Agri-Food Canada.
87. TURKINGTON, T.K., OLFERT, O.O., WEISS, R.M., CLEAR, R.M., Xi, K., TEWARI, J.P., & STRELKOV, S.E. (2004). Forecasting the potential distribution and abundance of plant diseases using CLIMEX™ modeling with historical and potential weather scenarios associated with climate change. In Manitoba Agron. Conf. 2004 Proceedings (pp. 99-110). Retrieved from http://www.umanitoba.ca/afs/ agronomists-conf/proceedings/2004/turkington-forecasting-potential.pdf [accessed 4 May 2009].
88. VIGIER, B., CHIANG, M.S., & HUME, D.J. (1989). Source of resistance to clubroot (Plasmodiophora brassicae Wor.) in triazine-resistant spring canola (rapeseed). Can. Plant Dis. Surv., 69, 113-115.
89. WAKEHAM, A.J., & WHITE, J.G. (1996). Serological detection in soil of Plasmodiophora brassicae resting spores. Physiol. Mol. Plant Pathol., 48, 289-303. (Pubitemid 126746004)
90. WALKER, G. (2005). Crop profile for cabbage and broccoli in Canada. Ottawa, Ontario: Pest Management Centre, Agriculture and Agri-Food Canada.
91. WALLENHAMMAR, A.-C. (1996). Prevalence of Plasmodiophora brassicae in a spring oilseed rape growing area in central Sweden and factors influencing soil infestation levels. Plant Pathol., 45, 710-719. (Pubitemid 27103200)
92. WALLENHAMMAR, A.-C., & ARWIDSSON, O. (2001). Detection of Plasmodiophora brassicae by PCR in naturally infested soils. Eur. J. Plant Pathol., 107, 313-321.
93. WATSON, A.G., & BAKER, K.F. (1969). Possible gene centers for resistance in the genus Brassica to Plasmodiophora brassicae. Econ. Bot., 23, 245-252.
94. WILUAMS, P.H. (1966). A system for the determination of races of Plasmodiophora brassicae that infect cabbage and rutabaga. Phytopathology, 56, 624-626.
95. WORONIN, M.S. (1878). Plasmodiophora brassicae, the cause of cabbage hernia.
96. Translated by C. Chupp (1934). Phytopathological Classic No. 4. St. Paul, MN: American Phytopathological Society.
97. XUE, S., CAO, T., HOWARD, R.J., HWANG, S.F., & STRELKOV, S.E. (2008). Isolation and variation in virulence of single-spore isolates of Plasmodiophora brassicae from Canada. Plant Dis., 92, 456-462.
98. TOMS, H.N.W. (1966). Estimates of crop losses in the Lower Fraser Valley of British Columbia in 1965. Can. Plant Dis. Surv., 46, 112-114.
99. TOMS, H.N.W. (1968). Estimates of crop losses in the Lower Fraser Valley of British Columbia, 1966. Can. Plant Dis. Surv., 48, 28-31.
100. TREMBLAY, N., BELEC, C., COULOMBE, J., & GODIN, C. (2005). Evaluation of calcium cyanamide and liming for control of clubroot disease in cauliflower. Crop Protection, 24, 798-803.
101. TREMBLAY, N., BÉLEC, C., LAWRENCE, H., & CARISSE, O. (1999). Clubroot of crucifers - control strategies. Saint-Jean-sur Richelieu, PQ: Agriculture and Agri-Food Canada.
102. TURKINGTON, T.K., OLFERT, O.O., WEISS, R.M., CLEAR, R.M., Xi, K., TEWARI, J.P., & STRELKOV, S.E. (2004). Forecasting the potential distribution and abundance of plant diseases using CLIMEX™ modeling with historical and potential weather scenarios associated with climate change. In Manitoba Agron. Conf. 2004 Proceedings (pp. 99-110). Retrieved from http://www.umanitoba.ca/afs/ agronomists-conf/proceedings/2004/turkington-forecasting-potential.pdf [accessed 4 May 2009].
103. VIGIER, B., CHIANG, M.S., & HUME, D.J. (1989). Source of resistance to clubroot (Plasmodiophora brassicae Wor.) in triazine-resistant spring canola (rapeseed). Can. Plant Dis. Surv., 69, 113-115.
104. WAKEHAM, A.J., WHITE, J.G. (1996). Serological detection in soil of Plasmodiophora brassicae resting spores. Physiol. Mol. Plant Pathol., 48, 289-303. (Pubitemid 126746004)
105. WALKER, G. (2005). Crop profile for cabbage and broccoli in Canada. Ottawa, Ontario: Pest Management Centre, Agriculture and Agri-Food Canada.
106. WALLENHAMMAR, A.-C. (1996). Prevalence of Plasmodiophora brassicae in a spring oilseed rape growing area in central Sweden and factors influencing soil infestation levels. Plant Pathol., 45, 710-719. (Pubitemid 27103200)
107. WALLENHAMMAR, A.-C., & ARWIDSSON, O. (2001). Detection of Plasmodiophora brassicae by PCR in naturally infested soils. Eur. J. Plant Pathol., 107, 313-321.
108. WATSON, A.G., & BAKER, K.F. (1969). Possible gene centers for resistance in the genus Brassica to Plasmodiophora brassicae. Econ. Bot., 23, 245-252.
109. WILUAMS, P.H. (1966). A system for the determination of races of Plasmodiophora brassicae that infect cabbage and rutabaga. Phytopathology, 56, 624-626.
110. WORONIN, M.S. (1878). Plasmodiophora brassicae, the cause of cabbage hernia.
111. Translated by C. Chupp (1934). Phytopathological Classic No. 4. St. Paul, MN: American Phytopathological Society.
112. XUE, S., CAO, T., HOWARD, R.J., HWANG, S.F., & STRELKOV, S.E. (2008). Isolation and variation in virulence of single-spore isolates of Plasmodiophora brassicae from Canada. Plant Dis., 92, 456-462.