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PMRA releases linuron re-evaluation decision

Some uses of linuron products will continue, but many have been cancelled.

November 9, 2020  By Fruit and Vegetable

Health Canada’s Pest Management Regulatory Agency (PMRA) has completed their re-evaluation of linuron herbicide. Under the authority of the Pest Control Products Act, Health Canada has determined that continued registration of some products containing linuron is acceptable.

Linuron is a selective systemic herbicide that was originally registered for the control of annual and perennial broadleaf and grassy weeds in several fruit, vegetable and field crops.

According to the PMRA, an evaluation of available scientific information found that some uses – carrots, parsnip, potato, asparagus, shelterbelts – of linuron products meet current standards for protection of human health and the environment when used according to revised conditions of registration, which include new mitigation measures.

Use of linuron has been cancelled for the following crops, as the health risks were deemed unacceptable: tree fruits (apple, peach, pear, plum/prune, cherry), corn (field and sweet), wheat, barley, oats, soybean, celery, Saskatoon berries, chokecherries, dill, coriander, caraway, sweet white lupins, and pre-emergent combined with post-harvest application to asparagus.

Certain crops will have an extended phase-out schedule due to the significant challenges growers will face in managing weeds.

While the PMRA regularly reviews all registered pesticides, special reviews are undertaken when products are either prohibited by a country or there is reason to believe it poses health or environmental risks. This special review was initiated due to decisions by Norway and the European Union to prohibit all uses of linuron due to health and environmental concerns.

For the full breakdown of Health Canada’s decision and mitigation measures, visit the PMRA website.

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