Proposed Maximum Residue Limit PMRL2020-09, Bixafen

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Pest Management Regulatory Agency
3 June 2020
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2020-9E-PDF (PDF version)

Under the authority of the Pest Control Products Act, Health Canada’s Pest Management Regulatory Agency (PMRA) has received applications to register technical grade bixafen and the end-use product F9651-2 Fungicide for use in Canada on wheat, barley, oats and soybeans.

The evaluation of these bixafen applications indicated that the end-use product has value, and the human health and environmental risks associated with their proposed uses are acceptable. Details regarding these applications can be found in Proposed Registration Decision PRD2019-04, Bixafen and F9651-2 Fungicide, posted to the website on 21 May 2019.

Before registering a pesticide for food use in Canada, the PMRA must determine the quantity of residues that are likely to remain in or on the food when the pesticide is used according to label directions and that such residues will not be a concern to human health. This quantity is then legally specified as a maximum residue limit (MRL). An MRL applies to the identified raw agricultural food commodity as well as to any processed food product that contains it, except where separate MRLs are specified for the raw agricultural commodity and a processed product made from it.

In addition, the PMRA is proposing to specify MRLs for bixafen on additional cereal grain commodities, root and tuber vegetables and peanuts to permit the import and sale of food containing such residues. The PMRA has determined the quantity of residues that are likely to remain in or on the imported commodities when bixafen is used according to label directions in the exporting country, and that such residues will not be a concern to human health. Details regarding the proposed MRLs on imported commodities can also be found in PRD2019-04.

Consultation on the proposed MRLs for bixafen was conducted via PRD2019-04. Information regarding the proposed MRLs can be found in Sections 3.5 and 7.1. Supporting field trial residue data are also provided in the PRD. The PMRA invites the public to submit written comments on the proposed MRLs for bixafen in accordance with the guidance found in PRD2019-04.

To comply with Canada’s international trade obligations, consultation on the proposed MRL is also being conducted internationally by notifying the World Trade Organization, as coordinated by Canada’s Notification Authority and Enquiry Point.

The proposed MRLs for bixafen are as follows.

Table 1 Proposed Maximum Residue Limits for Bixafen
Common Name Residue Definition MRL (ppm)Table 1 Footnote 1 Food Commodity
Bixafen N-(3’,4’-dichloro-5-fluoro[1,1’-biphenyl]-2-yl)-3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxamide 3.0 Sorghum
0.4 Cereal grains, except rice and sorghum (crop group 15)
0.3 Root vegetables (crop subgroup 1A)
0.04 Dry soybeans
0.01 Tuberous and corm vegetables (crop subgroup 1C), peanuts
N-(3’,4’-dichloro-5-fluoro[1,1’-biphenyl]-2-yl)-3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxamide, including the metabolite N-(3' ,4'-dichloro-5- fluorobiphenyl-2-yl)-3- (difluoromethyl)-1H-pyrazole-4-carboxamide (expressed as parent equivalents) 0.2 Fat, meat and meat byproducts of cattle, goats, horses and sheep
0.05 Milk
0.01 Eggs; fat, meat and and meat byproducts of hogs and poultry
Table 1 Footnote 1

ppm = parts per million

Table 1 Return to footnote 1 referrer

MRLs are proposed for each commodity included in the listed crop groupings in accordance with the Residue Chemistry Crop Groups webpage in the Pesticides section of the website.

MRLs established in Canada may be found using the Maximum Residue Limit Database on the Maximum Residue Limits for Pesticides webpage. The database allows users to search for established MRLs, regulated under the Pest Control Products Act, both for pesticides or for food commodities.

International Situation and Trade Implications

Table 2 compares the MRLs proposed for bixafen in Canada with corresponding American tolerances and Codex MRLs. AmericaFootnote 1n tolerances are listed inthe Electronic Code of Federal Regulations, 40 CFR Part 180, by pesticide. A listing of established Codex MRLs is available on the Codex Alimentarius Pesticide Index webpage, by pesticide or commodity.

Table 2 Comparison of Canadian MRLs, American Tolerances and Codex MRLs (where different)
Food Commodity Canadian MRL (ppm) American Tolerance (ppm) Codex MRL (ppm)





Eggs; fat, meat and meat byproducts of hogs and poultry


Not established

  • 0.05 (Eggs)
  • 0.05 (Poultry fats, poultry edible offal of)
  • 0.02 (Poultry meat)

Fat, meat and  meat byproducts of cattle, goat, horse and sheep


  • 0.08 (Meat and fat of cattle, goats, sheep, horses)
  • 0.4 (Meat byproducts of cattle, goats, sheep, horses)
  • 4 (Edible offal (mammalian)
  • 2 (Mammalian fats except milk fats)
  • 2 (Meat (from mammals other than marine mammals))

Rye, triticale, wheat



  • 0.05 (Rye, triticale, wheat)
  • 0.15 (Wheat bran, unprocessed)

Next Steps

The PMRA invites the public to submit written comments on the proposed MRLs for bixafen up to 75 days from the date of publication of this document. Please forward your comments to Publications. The PMRA will consider all comments received before making a final decision on the proposed MRLs. Comments received will be addressed in a separate document linked to this PMRL. The established MRLs will be legally in effect as of the date that they are entered into the Maximum Residue Limit Database.

Footnote 1

The Codex Alimentarius Commissionis an international organization under the auspices of the United Nations that develops international food standards, including MRLs.

Return to footnote 1 referrer

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