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Earliest canola fields are coming into flower, and many areas of the Prairies have more than enough moisture to elevate the sclerotinia stem rot risk. Here are key risk reminders……
Sclerotinia stem rot
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Many things can cause yields to be lower than expected. Crops that run out of nutrients may have significant biomass but smaller or fewer seeds in the pods. Moisture and…… -
Three major stem diseases — blackleg, clubroot and sclerotinia stem rot — are more easily identified in the weeks leading up to harvest. Areas of the field with prematurely ripening plants and excessive lodging are signs that any one of these three diseases could be present… -
Improved moisture in some regions has extended flowering. Some fields have been at “full flower” for what seems like weeks. Highly variable crops may also be at full flower or their “most yellow” — other terms for 50% flower — for longer than typically expected. This does extend the sclerotinia stem rot risk. But that "risk" may still not be… -
Scattered rain with more in the forecast will have growers wondering this week whether to spray fungicide to manage sclerotinia stem rot. Moisture is the key risk factor for sclerotinia stem rot. Without moisture a couple of weeks before flowering and humidity during and after flowering, disease severity and the return on investment from fungicide will be lower than if… -
Moisture is the key risk factor for sclerotinia stem rot. Without moisture before, during and after flowering, disease severity and the return on investment from fungicide will be lower than if moisture is present all through these periods. Moisture can come as rain, dew and/or humidity above 80%… -
Sclerotinia stem rot and cabbage seedpod weevil control timing depends on flowering stage. This article will help you estimate 10%, 20% and 50% flower… -
While you are out there checking to see if your crop is ready to cut/harvest is a perfect time to also check for disease! Likewise, the representative sampling technique used to accurately determine the stage of the crop is also ideal for disease scouting of your field. Pulling out a few plants and checking for the big three diseases, as… -
The risk of sclerotinia stem rot infection is still present on later crops that have not reached full flower, especially given the rain and high humidity in some regions this week. Highly variable crops may also be at “full flower” or their “most yellow” — other terms for 50% flower — for longer than typically expected, which also extends the…
