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Canada proposes renewal of two herbicides
Jul. 14, 2014
Health Canada’s Pest Management Regulatory Agency (PMRA) has proposed continued registration of herbicide flumetsulam and triflusulfuron-methyl. Neither of the herbicide present unacceptable risks to human health or the environment when used according to the proposed label directions.
Flumetsulam from Dow AgroScience is a selective Group 2 herbicide which belongs to the triazolopyrimidine family. It is an inhibitor of the plant enzyme acetolactate synthase. PMRA proposes a restricted-entry interval (REI) of 12 hours to protect workers entering treated sites is required, and a pre-harvest interval (PHI) of 90 days for soybean. Spray buffer zones for non-target aquatic habitats is required, as well as precautionary statements for sites that may be conducive to runoff and when heavy rain is forecasted, in order to reduce the potential for flumetsulam run off to adjacent aquatic habitats.
DuPont’s triflusulfuron-methyl is a postemergence herbicide that belongs to the sulfonylurea class of crop protection chemicals, which also inhibits acetolactate synthase enzyme in plant. In Canada, this active ingredient is registered for control of certain broadleaved weeds and grasses in sugar beets and garden beets, as well as in root chicory (Ontario only). PMRA proposed a standard 12-hour restricted‑entry interval (REI) and revised buffer zones to protect non-target, sensitive aquatic and terrestrial habitats.
Source: Health Canada
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