How late is too late for nitrogen top dress?

Can it be too wet for sclerotinia stem rot infection? A lot of Western Canada has the moisture for good canola yields and for sclerotinia stem rot infection. It will be a busy season of fungicide spraying. But can it be too wet? Not really.Rain events that reduce sclerotinia stem rot risk would be unusual. It could take three weeks of saturated soils to kill the sclerotia resting bodies in the soil. And if some parts of the field are in this situation, most of the field could have exceptional gr