Proposed Maximum Residue Limit PMRL 2019-16, Triticonazole

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Pest Management Regulatory Agency
23 August 2019
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2019-16E-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 the new use on annual canarygrass for human consumption to the product label, Insure Cereal FX4, containing technical grade pyraclostrobin, fluxapyroxad, triticonazole and metalaxyl, is acceptable. The specific uses approved in Canada are detailed on the label of Insure Cereal FX4, Pest Control Products Act Registration Number 33210.

The evaluation of this triticonazole 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 triticonazole is being conducted via this document (see Next Steps). MRL consultation for the other active ingredients, pyraclostrobin, fluxapyroxad and metalaxyl, present in Insure Cereal FX4 is being consulted under separate actions. 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 triticonazole, is as follows.

Table 1 - Proposed Maximum Residue Limit for Triticonazole
Common Name Residue Definition MRL (ppm)Footnote 1 Food Commodity
Triticonazole (5E)-5-[(4-chlorophenyl)methylene]-2, 2-dimethyl-1-(1H-1,2,4-triazol-1-ylmethyl) cyclopentanol 0.01 Annual canarygrass seeds
Footnote 1

ppm = parts per million

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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

Currently, there is no American tolerance for triticonazole on annual canarygrass seeds listed in the Electronic Code of Federal Regulations, 40 CFR Part 180, by pesticide, nor is there any Codex MRLFootnote 1 listed for triticonazole on annual canarygrass seeds on the Codex Alimentarius Pesticide Index webpage, by pesticide or commodity.

Next Steps

The PMRA invites the public to submit written comments on the proposed MRL for triticonazole 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 on wheat and barley (translated to annual canarygrass) were reassessed in the framework of this petition.

Maximum Residue Limits

The recommendation for a maximum residue limit (MRLs) for triticonazole was based upon the previously reviewed 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 annual canarygrass seeds.

Table A1 - Summary of Field Trial and Processing Data Used to Support the MRL
Commodity Application Method/ Total Application Rate
(g a.i./100 kg seed)Footnote 1
Preharvest Interval (days) Lowest Average Field Trial Residues
Highest Average Field Trial Residues
Experimental Processing Factor
Wheat grain Seed treatment / 10 77-116 <0.01 <0.01Footnote 2 Not expected to concentrate in processed fractions
Barley grain <0.01 <0.01Footnote 2
Footnote 1

g a.i./100 kg seed = grams of active ingredient per 100 kg treated seed.

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Footnote 2

Based on the degree of exaggeration (2-fold) of the seed treatment, it was determined that residues resulting from 5 g a.i./100 kg seed would not be quantifiable.

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Following the review of all available data, an MRL as proposed in Table 1 is recommended to cover residues of triticonazole. Residues of triticonazole in annual canarygrass seeds 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.

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