Proposed Maximum Residue Limit PMRL2020-46, Ethalfluralin

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Pest Management Regulatory Agency
8 December 2020
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2020-46E-PDF (PDF version)

Under the authority of the Pest Control Products Act, Health Canada's Pest Management Regulatory Agency (PMRA) has concluded that the addition of a new use on Gold of Pleasure (camelina) to the product label of Edge Granular Herbicide, containing technical grade ethalfluralin, is acceptable. The specific use approved in Canada is detailed on the label of Edge Granular Herbicide, Pest Control Products Act Registration Number 20980.

The evaluation of this ethalfluralin application indicated that the end-use product has value and the human health and environmental risks associated with the new use is acceptable.

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 established 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.

Consultation on the proposed MRL for ethalfluralin is being conducted via this document (see Next steps). A summary of the field trial data used to support the proposed MRL can be found in Appendix I.

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 the Canada's Notification Authority and Enquiry Point.

The proposed MRL, to be added to the MRLs already established for ethalfluralin, is as follows.

Table 1 Proposed maximum residue limits for ethalfluralin
Common name Residue definition MRL (ppm)Footnote 1 Food commodity
Ethalfluralin N-ethyl-N-(2-methyl-2-propen-1-yl)-2,6-dinitro-4-(trifluoromethyl)benzenamine 0.05 Gold of Pleasure seeds
Footnote 1

ppm = parts per million

Return to footnote 1 referrer

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

The MRL proposed for ethalfluralin in Canada is the same as the corresponding American tolerance as listed in the Electronic Code of Federal Regulations, 40 CFR Part 180, by pesticide. Currently, there are no Codex MRLs Footnote 1 listed for ethalfluralin in or on any commodity on the Codex Alimentarius Pesticide Index webpage.

Next steps

The PMRA invites the public to submit written comments on the proposed MRL for ethalfluralin 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 MRL. Comments received will be addressed in a separate document linked to this PMRL. The established MRL will be legally in effect as of the date that it is entered into the Maximum Residue Limit Database.

Appendix I

Summary of field trial data used to support the proposed maximum residue limit

Previously reviewed residue data from field trials conducted in/on rapeseeds (canola) were reassessed in the framework of this petition. In addition, a processing study in treated canola was reviewed to determine the potential for concentration of residues of ethalfluralin into processed commodities.

Maximum residue limit

The recommendation for the maximum residue limit (MRL) for ethalfluralin was based upon the field trial data on file, and the guidance provided in the OECD MRL Calculator. Table A1 summarizes the residue data used to calculate the proposed MRL for Gold of Pleasure seeds.

Table A1 Summary of field trial and processing data used to support the MRL
Commodity Application method/ Total application rate
(g a.i./ha)Footnote 1
Preharvest interval (days) Lowest average field trial residues
Highest average field trial residues
Experimental processing factor
Rapeseeds (canola) Pre-plant/
78-148 <0.005 <0.021 No quantifiable residues observed at exaggerated rates
Footnote 1

g a.i./ha = grams of active ingredient per hectare

Return to footnote 1 referrer

Following the review of all available data, an MRL as proposed in Table 1 is recommended to cover residues of ethalfluralin. Residues of ethalfluralin in this crop commodity at the proposed MRL will not pose an unacceptable risk to any segment of the population, including infants, children, adults and seniors.


Footnote 1

The Codex Alimentarius Commission is 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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