Proposed maximum residue limit PMRL2020-03, Deltamethrin
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Pest Management Regulatory Agency
4 February 2020
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2020-3E-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 new uses on crop subgroup 6C to the product labels of Decis 5 EC Insecticide, containing technical grade deltamethrin, is acceptable. The specific uses approved in Canada are detailed on the labels of Decis 5 EC Insecticide (Prairie Provinces and Interior of British Columbia) and Decis 5 EC Insecticide (Eastern Canada and British Columbia), Pest Control Products Act Registration Numbers 17734 and 22478, respectively.
The evaluation of this deltamethrin application indicated that the end-use products have value and the human health and environmental risks associated with the new uses 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.
To comply with Canada's international trade obligations, consultation on the proposed MRLs 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 deltamethrin, is as follows.
|Common name||Residue definition||MRL (ppm)Table 1: Tablenote 1||Food commodity|
cyclopropanecarboxylic acid, 3-(2,2-dibromoethenyl)-2,2-dimethyl-, (S)-cyano(3-phenoxyphenyl)methyl ester, (1R,3R)-, including the isomers
cyclopropanecarboxylic acid, 3-(2,2-dibromoethenyl)-2,2-dimethyl-, (S)-cyano(3-phenoxyphenyl)methyl ester, (1R,3S)- and
cyclopropanecarboxylic acid, 3-(2,2-dibromoethenyl)-2,2-dimethyl-, (R)-cyano(3-phenoxyphenyl)methyl ester, (1R,3R)-
|0.07||Dried shelled pea and bean, except soybean (crop subgroup 6C)|
Table 1: Tablenote 1
MRLs are proposed for each commodity included in the listed crop groupings in accordance with the Residue Chemistry Crop Groups webpage in the Pesticides and Pest Management section of the Canada.ca 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
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 deltamethrin in Canada with corresponding American tolerances and Codex MRLs.Footnote 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.
|Food commodity||Canadian MRL (ppm)||American tolerance (ppm)||Codex MRL (ppm)|
|Crop subgroup 6C||0.07||Not established||1.0 (Pulses)|
The PMRA invites the public to submit written comments on the proposed MRL for deltamethrin 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 MRLs will be legally in effect as of the date that they are entered into the Maximum Residue Limit Database.
Summary of field trial data used to support the proposed maximum residue limit
Residue data for deltamethrin in dry beans and dry peas were submitted to support the domestic use of Decis 5 EC Insecticide (Prairie Provinces and Interior of British Columbia) and Decis 5 EC Insecticide (Eastern Canada and British Columbia) on crop subgroup 6C.
Maximum residue limit
The recommendation for a maximum residue limit (MRL) for deltamethrin 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 crop subgroup 6C.
|Commodity||Application method/Total application rate
(g a.i./ha/season)Table A-1: Footnote 1
|Preharvest interval (days)||Lowest average field trial residues (ppm)||Highest average field trial residues (ppm)|
Table A-1: Footnotes
Following the review of all available data, the MRL as proposed in table 1 is recommended to cover total residues of deltamethrin. Total residues of deltamethrin in these crop commodities 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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