Growers in southern Alberta and southwestern Saskatchewan often spray for cabbage seedpod weevil at 20% flower. This is also an ideal time for sclerotinia spraying if conditions warrant a spray.
Canada’s crop protection rules allow growers to tank mix two products as long as they are both registered for the crop in question and at the timing and rates used. But these rules do not ensure these products can be mixed without problems in the tank (they may create a gummy mixture that ruins the sprayer) or without antagonizing each other (both products becoming less effective.) Growers are advised to ask the retailer or the crop protection company before trying a tank mix for the first time. Please read the updated article.