The Pest Management Regulatory Agency (PMRA) announced its final decisions for ferbam, thiram, and ziram fungicides on December 14th. All uses of ferbam and ziram have been cancelled in these decisions. For thiram, all foliar uses have also been cancelled. Most uses of thiram-based seed treatments for vegetables will remain registered with a few exceptions based on product formulation or application method. All uses that have been cancelled as a result of these decisions are proposed for a three-year phase out and therefore will no longer be registered for use by growers as of December 14th, 2021.
For more information, Chris Duyvelshoff, OFVGA crop protection advisor, recommends the following PMRA publications: