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Canada proposes to re-evaluate thiophanate-methyl
Jul. 5, 2019
Health Canada is consulting Canadians on its proposed re-evaluation decision for thiophanate-methyl. Thiophanate-methyl is a fungicide that controls a broad spectrum of diseases on a wide variety of crops and use sites in Canada, including greenhouse non-food crops, terrestrial food crops, mushrooms, outdoor ornamentals, turf, and seed treatment.
Based on the outcome of the risk assessment, Health Canada proposes continued registration for many uses of thiophanate-methyl with mitigation measures including:
• additional personal protective equipment, engineering controls, and limits on amount of product handled per day by workers
• new or revised restricted-entry intervals, limits on the number of applications per season, and limiting greenhouse cut flower applications to soil drench only
• spray buffer zones to protect aquatic habitats
• additional label statements that:
o inform users that thiophanate-methyl is toxic to bees, earthworms, birds, small- and medium-sized mammals, and aquatic organisms
o advise avoiding application during periods of bloom for crops that are attractive to pollinators
o inform not to discharge thiophanate-methyl-contaminated effluent from greenhouses and mushroom houses into aquatic environments
o inform users how to reduce the potential for runoff.
However, Health Canada is proposing to cancel the following uses of thiophanate-methyl, as risks to human health have not shown to be acceptable:
• Aerial application using wettable powder products
• Wettable powder products on all turf uses, white bean, sugarbeet, aspen and poplar
• All turf uses except on golf courses and sod farms for the liquid and water-soluble packaging products
• Greenhouse tobacco seedlings (foliar spray and foliar drench applications)
• Greenhouse cut flowers (foliar application)
• Outdoor cut flowers
• Apples and pears at the high application rate
• Peach, nectarine, plum, prune, cherry
• Commercial seed treatment of bean seeds using wettable powder products
• On-farm dry application to bean seeds using wettable powder products
• Potato seed piece treatment for all product formulations.
This consultation is open for comment from 28 June 2019 to 26 September 2019 (90 calendar days).
Source: Health Canada
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