Sclerotinia has become a yearly concern for most Manitoba canola growers. The fungus Sclerotinia sclerotiorum occurs in all the canola growing areas of Canada, causing stem rot, which is one of the most destructive diseases of canola.
Click link to use the Sclerotinia Treatment Decision Tool put out by Manitoba Agriculture Food and Rural Development.
The greater the risk score for a field the higher the probability of a positive economic return.
Sclerotinia incidence can vary greatly among fields and years, making scheduled spraying of fungicides unprofitable. However, when sclerotinia risk is high, preventative fungicide applications can effectively lower disease severity and improve yield. Assessment of disease risk within each field is essential to improve the odds that fungicides are only applied when it is economical to do so.