Proposed Re-evaluation Decision PRVD2021-04, Cymoxanil and Its Associated End-use Products
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Pest Management Regulatory Agency
26 February 2021
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2021-4E-PDF (PDF version)
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Table of contents
- Proposed re-evaluation decision for cymoxanil and associated end use products
- Proposed re-evaluation decision for cymoxanil
- Risk mitigation measures
- International context
- Next steps
- Additional scientific information
Proposed re-evaluation decision for cymoxanil and associated end use products
Under the authority of the Pest Control Products Act, all registered pesticides must be re-evaluated by Health Canada’s Pest Management Regulatory Agency (PMRA) to ensure that they continue to meet current health and environmental standards and continue to have value. The re-evaluation considers data and information from pesticide manufacturers, published scientific reports and other regulatory agencies. Health Canada applies internationally accepted risk assessment methods as well as current risk management approaches and policies.
Cymoxanil is a fungicide registered for use on potatoes, field tomatoes and caneberries. Currently registered products containing cymoxanil can be found in the Pesticide Label Search and in Appendix I of PRVD2021-04.
This document (Proposed Re-evaluation Decision PRVD2021-04, Cymoxanil and Its Associated End-use Products) presents the proposed re-evaluation decision for the re-evaluation of cymoxanil, including the proposed amendments (risk mitigation measures) to protect human health and the environment, as well as the science evaluation on which the proposed decision is based. All products containing cymoxanil that are registered in Canada are subject to this proposed re-evaluation decision. PRVD2021-04 is subject to a 90-day public consultation periodFootnote 1 during which the public including the pesticide manufacturers and stakeholders may submit written comments and additional information to PMRA Publications. The final re-evaluation decision will be published after taking into consideration the comments and information received during the consultation period.
Proposed re-evaluation decision for cymoxanil
Under the authority of the Pest Control Products Act and based on an evaluation of available scientific information, Health Canada is proposing continued registration of cymoxanil and all associated end-use products registered for sale and use in Canada.
With respect to human health, occupational and postapplication risks were shown to be acceptable when cymoxanil is used according to proposed conditions of registration, which include new mitigation measures. Dietary risks were shown to be acceptable when used according to current conditions of registration.
Based on available scientific information, the risks to the environment were shown to be acceptable when cymoxanil is used according to proposed conditions of registration, which includes new mitigation measures.
Cymoxanil has value in disease control for potato, field tomato and caneberry growers, due to its protective, curative and broad spectrum disease control properties. It is the only Group 27 fungicide registered in Canada, which makes it important as a resistance management tool.
Risk mitigation measures
Registered pesticide product labels include specific directions for use. Directions include risk mitigation measures to protect human health and the environment and must be followed by law. The proposed label amendments including any revised/updated label statements and/or mitigation measures, as a result of the re-evaluation of cymoxanil, are summarized below. Refer to Appendix X of PRVD2021-04 for details.
Label improvements to meet current standards:
- The spray volume for all aerial application is 50 L/ha (for consistency between product labels).
To protect the mixers/loaders/applicators, the following risk-reduction measures are proposed:
- Groundboom application for potatoes:
- Chemical-resistant coveralls over long-sleeved shirt and long pants, chemical-resistant gloves for mixers/loaders and applicators, plus a respirator for mixers/loaders.
- Limit of 35 kg a.i./day cymoxanil products handled.
- Airblast application for caneberries:
- Chemical-resistant coveralls over long-sleeved shirt and long pants, chemical-resistant gloves for mixers/loaders and applicators (no gloves if enclosed cab).
- Chemical resistant headgear for applicators using open cab airblast equipment.
- Handheld application (spot applications):
- Chemical-resistant coveralls over a single layer of clothing, chemical-resistant gloves for mixers/loaders and applicators, plus a respirator for mixers/loaders.
- Aerial application:
- For potatoes:
- Chemical-resistant coveralls over long-sleeved shirt and long pants, chemical resistant gloves for mixing/loading, plus a respirator for workers mixing/loading of cymoxanil products.
- Limit of 52.5 kg a.i./day cymoxanil products handled.
- For potatoes:
To protect workers entering treated sites, the following risk-reduction measures are proposed:
- Revised Restricted-entry intervals (REIs):
- 18 days for hand-set irritation for potatoes.
- 6 days for roguing potatoes.
- 8 days for hand-set irrigation for field tomatoes.
- 11 days for hand-set irrigation for caneberries.
To protect bystanders from spray drift:
- A statement to promote best management practices to minimize human exposure from spray drift or spray residues resulting from drift.
Label improvements to meet current standards:
- Update label statements related to disposal of the product containers and product storage.
To protect the environment, the following risk-reduction measures are proposed:
- Environmental hazard statements are required on end-use product labels for aquatic organisms.
- Spray buffer zones are required on the co-formulated product of cymoxanil and famoxadone to protect aquatic habitats.
- Precautionary label statements for sites with characteristics that may be conducive to runoff and when heavy rain is forecast are required.
As of 15 July 2020, cymoxanil is currently acceptable for use in other Organisation for Economic Co-operation and Development (OECD) member countries, including the United States and the European Union. No decision by an OECD member country to prohibit all uses of cymoxanil for health or environmental reasons has been identified.
Upon publication of this proposed re-evaluation decision (PRVD2021-04), the public, including the registrants and stakeholders are encouraged to submit additional information that could be used to refine risk assessments during the 90-day public consultation period.
All comments received during the 90-day public consultation period will be taken into consideration in preparation of the re-evaluation decision document,Footnote 2 which could result in revised risk mitigation measures. The re-evaluation decision document will include the final re-evaluation decision, the reasons for it and a summary of comments received on the proposed re-evaluation decision with Health Canada’s responses.
Refer to Appendix I of PRVD2021-04 for details on specific products impacted by this proposed decision.
Additional scientific information
No additional scientific data are required at this time.
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