Clubroot of cruciferous crops – new perspectives on an old disease†

^†Contribution to the symposium “Root Diseases; Challenges and Perspectives” held during the Canadian Phytopathological Society Annual Meeting, 22–25 June 2009, Winnipeg, MB.

Figures & data

Fig. 1. Clubroot disease cycle. (Courtesy of MAFRI: Figure by P. Northover.)

Table 1.  Production areas of major cole crop vegetables in Canada (Statistics Canada, 2009a)

Region	Broccoli	Cabbage	Cauliflower	Radish	Rutabaga/turnip
Alberta	12^a	–^b	–	–	–
British Columbia	374	291	42	36	93
New Brunswick	26	49	6	0	36
Newfoundland	8	49	4	0	134
Nova Scotia	–	194	–	0	85
Manitoba	138	160	–	–	–
Ontario	1532	1657	603	158	720
Prince Edward Island	20	81	91	0	202
Quebec	1457	1748	728	708	405
Saskatchewan	2	32	2	2	0
Prairie Provinces^c	152	192	2	2	0
Canada	3569	4261	1476	904	1675
Notes: ^aProduction areas reported in hectares.
^bData unavailable due to unreliability or confidentiality.
^cNumbers represent the combined total area of production for each vegetable in Alberta, Saskatchewan and Mantibo.

Table 2.  Production areas of canola and mustard in Canada (Statistics Canada, 2009b)

Region	Canola	Mustard
Alberta	2 003 200^a	50 500
British Columbia	30 400	0
New Brunswick	0	0
Newfoundland	0	0
Nova Scotia	0	0
Manitoba	1 244 400	0
Ontario	18 200	0
Prince Edward Island	0	0
Quebec	12 000	0
Saskatchewan	3 095 800	167 900
Prairie Provinces^b	6 343 400	218 400
Canada	6 404 000	218 400
Note: ^a Production areas reported in hectares.
^bNumbers represent the combined total area of production for cancla or mustard in Alberta, Saskatchewan and Mantibo.

Fig. 2. Pathotype composition of Plasmodiophora brassicae field populations and single-spore isolates collected from canola in Alberta, as defined on the differential set of Williams (1966).

Statistics Canada . 2009a . Fruit and vegetable production – June 2009 . Catalogue 22-003-X , 78 ( 1 )

 Google Scholar

Statistics Canada . 2009b . Field crop reporting series – September estimate of production of principal field crops . Catalogue 22-002-X , 88 ( 7 )

 Google Scholar

Williams , P.H. 1966 . A system for the determination of races of Plasmodiophora brassicae that infect cabbage and rutabaga . Phytopathology , 56 : 624 – 626 .

 Web of Science ®Google Scholar