The Saskatchewan government has released a map showing the spread of a serious canola plant disease called clubroot.
A survey found symptoms have been found in 43 canola fields and the pathogen in soil from another 3 fields bringing the total to 46.
That number is up from 37 fields the previous year.
Agriculture minister David Marit says the map shows clubroot is mainly in the far northern grainbelt but has been detected northeast of Yorkton and around Saskatoon and Rosetown.
The agriculture ministry says clubroot is a soil disease so farmers should avoid moving dirt from one field to another.
As well, farmers are advised to plant canola only once every 3 years in the same field.
About 15 hundred fields were tested as part of the survey last summer and fall.
Landowners with visible clubroot symptoms will be required to develop a clubroot management agreement with help from pest control officers.