A survey of 341 fields by the University of Alberta has found 66 new cases of clubroot in 2010.
More than 500 Alberta fields are now infected with clubroot. Last year, Alberta found about 50 more fields with the crop disease.
“Certainly it’s a disease that’s not going away,” Alberta oilseed specialist Murray Hartman said in an interview posted on the Alberta Canola Producers Commission website.
Fields that farmers seeded to clubroot-resistant varieties, however, show much less severe damage, he said.
“That’s the good news part of it (that) as these resistant varieties become more commonplace, it should put kind of a governor (limit) on this disease and how fast it is spreading,” Hartman said.