Proposed Maximum Residue Limit PMRL2021-07, Spinosad
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Pest Management Regulatory Agency
11 March 2021
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2021-7E-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 spearmint and peppermint tops to the product labels of Success Insecticide and Entrust Insecticide, containing technical grade spinosad, is acceptable. The specific uses approved in Canada are detailed on the labels of Success Insecticide and Entrust Insecticide, Pest Control Products Act Registration Numbers 26835 and 30382, respectively.
The evaluation of this spinosad application indicated that the end-use products have 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.
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 MRLs, to be added to the MRLs already established for spinosad, are as follows.
|Common name||Residue definition||MRL
(ppm)Table 1 Footnote 1
Spinosyn A: (2R,3aS,5aR,5bS,9S,13S,14R,16aS,16bR)-2-[(6-deoxy-2,3,4-tri-O-methyl-α-L-mannopyranosyl)oxy]-13-[[(2R,5S,6R)-5-(dimethylamino)tetrahydro-6-methyl-2H-pyran-2-yl]oxy]-9-ethyl-2,3,3a,5a,5b,6,9,10,11,12,13,14,16a,16b-tetradecahydro-14-methyl-1H-as-indaceno[3,2-d]oxacyclododecin-7,15-dione
Spinosyn D: (2S,3aR,5aS,5bS,9S,13S,14R,16aS,16bS)-2-[(6-deoxy-2,3,4-tri-O-methyl-α-L-mannopyranosyl)oxy]-13-[[(2R,5S,6R)-5-(dimethylamino)tetrahydro-6-methyl-2H-pyran-2-yl]oxy]-9-ethyl-2,3,3a,5a,5b,6,9,10,11,12,13,14,16a,16b-tetradecahydro-4,14-dimethyl-1H-as-indaceno[3,2-d]oxacyclododecin-7,15-dione
|3.5||Peppermint tops, spearmint tops|
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 MRLs proposed for spinosad in Canada are the same as corresponding American tolerances as listed in the Electronic Code of Federal Regulations, 40 CFR Part 180, by pesticide. Currently, there are no Codex MRLsFootnote 1 listed for spinosad in or on these commodities on the Codex Alimentarius Pesticide Index webpage.
The PMRA invites the public to submit written comments on the proposed MRLs for spinosad 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.
Summary of field trial data used to support the proposed maximum residue limits
Previously reviewed residue data from field trials conducted in/on peppermint and spearmint tops were reassessed in the framework of this petition. In addition, a processing study on treated mint tops was also reassessed to determine the potential for concentration of residues of spinosad into processed commodities.
Maximum residue limits
The recommendation for the maximum residue limits (MRLs) for spinosad 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 MRLs for peppermint and spearmint tops.
|Application method/Total application rate
(g a.i./ha)Table 2 Footnote 1
|Lowest average field trial residues
|Highest average field trial residues
|Experimental processing factor|
|Mint Tops||520–530||6–7||0.258||3.01||Mint oil: 0.02×|
Following the review of all available data, the MRLs as proposed in Table 1 are recommended to cover residues of spinosad. Residues of spinosad in peppermint and spearmint tops at the proposed MRLs will not pose an unacceptable risk to any segment of the population, including infants, children, adults and seniors.
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