Proposed Maximum Residue Limit PMRL2020-45, Ethaboxam

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Pest Management Regulatory Agency
8 December 2020
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2020-45E-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 sugar beets to the product label of INTEGO Solo Fungicide, containing technical grade ethaboxam, is acceptable. The specific use approved in Canada is detailed on the label of INTEGO Solo Fungicide, Pest Control Products Act Registration Number 31324.

The evaluation of this ethaboxam application indicated that the end-use product has value and the human health and environmental risks associated with the new use are 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 ethaboxam 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 ethaboxam, is as follows.

Table 1 Proposed maximum residue limit for ethaboxam
Common name Residue definition MRL (ppm)Footnote 1 Food commodity
Ethaboxam N-(cyano-2-thienylmethyl)-4-ethyl-2-(ethylamino)-5-thiazolecarboxamide 0.03 Sugar beet roots
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

MRLs may vary from one country to another for a number of reasons, including differences in pesticide use patterns and the locations of the crop field trials used to generate residue chemistry data.

Table 2 compares the MRL proposed for ethaboxam in Canada with the corresponding American tolerance and Codex MRLFootnote 1. American tolerances are listed in the 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 MRL, American Tolerance and Codex MRL (where different)
Food commodity Canadian MRL (ppm) American Tolerance (ppm) Codex MRL
Sugar beet roots 0.03 Not established Not established

Next steps

The PMRA invites the public to submit written comments on the proposed MRL for ethaboxam 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

Residue data for ethaboxam in sugar beets were submitted to support the domestic use of INTEGO Solo Fungicide on sugar beets. In addition, a processing study in treated sugar beets was reviewed to determine the potential for concentration of residues of ethaboxam into processed commodities.

Maximum residue limit

The recommendation for a maximum residue limit (MRL) for ethaboxam was based upon the submitted field trial data, and the guidance provided in the OECD MRL Calculator. Table A1 summarizes the residue data used to calculate the proposed MRL for sugar beet roots.

Table A1 Summary of field trial and processing data used to support the MRL
Commodity Application method/ Total application rate
(g a.i./100 000 seeds)Footnote 1
Preharvest interval (days) Lowest average field trial residues
Highest average field trial residues
Experimental processing factor
Sugar beet roots Seed treatment/4.32-4.84 90-157 <0.01 0.022 No concentration in processed fractions
Footnote table A 1

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

Return to footnote 1 referrer

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

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