PMRA released their evaluation for mancozeb and metiram products in June, 2018. According to that decision, all uses of products containing mancozeb (Manzate, Penncozeb, Dithane, Ridomil Gold MZ and Gavel) and metiram (Polyram) were to be cancelled with the exception of foliar applications to potatoes. Representatives from the Ontario Fruit and Vegetable Growers Association and the Canadian Horticulture Council met with PMRA with their concerns about the loss of these products. PMRA has decided to restart the review process for mancozeb. All current final decisions and proposals regarding MRLs for mancozeb products will removed and a new proposal for consultation will be posted. However, the decision for metiram could not be reversed for legal reasons. This means that as of June 2020, Polyram cannot be used on any crop except potatoes and the label will reflect that change.
Source : ONfruit