Sclerotinia risk high, but does it pay to spray?

A sclerotinia-infected canola stem. (Photo courtesy Canola Council of Canada)

Provincial agriculture officials are warning Manitoba farmers that the sclerotinia risk in canola is high in many areas of the province — but farms may want to do a cost-benefit analysis before treating if their crop is already compromised by excess moisture. [Related story]

If using a fungicide to protect the crop, target application for sclerotinia protection at between 20 to 50 per cent flowering. Fifty per cent flowering is when the field is the brightest yellow. Later applications will provide little benefit.

For assistance deciding whether to treat the field, the province offers an online decision-making tool that can help determine the return on investment.



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