Proposed Re-evaluation Decision PRVD2020-10, Kresoxim-methyl and Its Associated End-use Products
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Pest Management Regulatory Agency
16 July 2020
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2020-10E-PDF (PDF version)
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Table of contents
- Proposed re-evaluation decision
- Outcome of science evaluation
- Proposed regulatory decision for kresoxim-methyl
- Proposed risk mitigation measures for kresoxim-methyl
- International context
- Next steps
- Additional scientific information
Proposed re-evaluation decision
Under the authority of the Pest Control Products Act, all registered pesticides must be regularly 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.
Kresoxim-methyl is a fungicide registered for use on apples, pears and grapes and can be applied by ground application equipment only. Currently registered products containing kresoxim-methyl can be found in Appendix I of PRVD2020-10.
This document (PRVD2020-10, Kresoxim-methyl and Its Associated End-use Products) presents the proposed regulatory decision for the re-evaluation of kresoxim-methyl including the proposed risk mitigation measures to further protect human health and the environment , as well as the science evaluation on which the proposed decision was based. All products containing kresoxim-methyl registered in Canada are subject to this proposed re-evaluation decision. This document (PRVD2020-10) is subject to a 90-day public consultation period, during which the public including the pesticide manufacturers and stakeholders may submit written comments and additional information to the PMRA . The final re-evaluation decision will be published taking into consideration the comments and information received.
Outcome of science evaluation
Due to its systemic action with protective, curative and long residual properties, kresoxim-methyl is of value to apple and pear growers for the management of scab and powdery mildew and to grape growers for black rot and powdery mildew management. The curative property of kresoxim-methyl helps slow down the post-infection development of diseases.
With respect to human health, risks have been shown to be acceptable with proposed mitigation measures. Mitigation measures are required for apples, pears and grapes with regards to the number of applications per season.
Based on available scientific information, potential risks to the environment have been shown to be acceptable when kresoxim-methyl is used according to the proposed label directions.
Proposed regulatory decision for kresoxim-methyl
Under the authority of the Pest Control Products Act and based on the evaluation of currently available scientific information, Health Canada is proposing that products containing kresoxim-methyl are acceptable for continued registration in Canada, provided that the additional proposed risk mitigation measures are in place.
Proposed risk mitigation measures for kresoxim-methyl
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. As a result of the re-evaluation of kresoxim-methyl, further risk mitigation measures for product labels are being proposed for product labels. Refer to Appendix IX of PRVD2020-10 for details.
As a result of the re-evaluation of kresoxim-methyl, the PMRA is proposing further risk-reduction measures in addition to those already identified on kresoxim-methyl product labels. Additional revisions to the kresoxim-methyl labels are proposed to update label statements to current policies and language.
To protect workers from exposure to kresoxim-methyl while applying with a handheld airblast/mistblower, the following requirements are proposed:
- Workers must wear chemical-resistant (CR) coveralls with a CR hood over long-sleeved shirt, long pants, CR gloves, socks, CR footwear, and a respirator with a NIOSH-approved organic-vapour-removing cartridge with a prefilter approved for pesticides OR a NIOSH-approved canister approved for pesticides.
To protect the general population from dietary exposure through drinking water, the following proposed risk mitigation measures are required:
- Reduce the maximum number of applications for the lower application rates (90–120 g a.i./ha) to 2 applications per year (from 4), for all crops (apples, pears, and grapes) and pests.
- Reduce the maximum number of applications for all higher rates (121–225 g a.i./ha) to 1 application per year (from 4), for all crops (apples, pears, and grapes) and pests.
- Revise the resistance management statement and total seasonal rates accordingly.
To protect the environment, the following proposed risk mitigation measures are required:
- Precautionary label statements to inform users that kresoxim-methyl is toxic to aquatic organisms, birds, certain beneficial arthropods, and terrestrial plants.
- A statement to inform users that the product demonstrates the properties and characteristics associated with chemicals detected in groundwater.
- Standard statements prohibiting the use of kresoxim-methyl products to control aquatic pests, and to reduce the risk of contamination of water, food or feed.
- A statement prohibiting the use of aerial application equipment.
- Buffer zones to protect freshwater (≤ 10 m), estuarine/marine (≤ 2 m) and terrestrial habitats (1 m).
Kresoxim-methyl is currently acceptable for use in other Organisation for Economic Co-operation and Development (OECD) member countries, including the United States, the European Union, and Australia. No decision by an OECD member country to prohibit all uses of kresoxim-methyl for health or environmental reasons has been identified.
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 periodFootnote 1 upon publication of PRV2020-10.
All comments received during the 90-day public consultation period will be taken into consideration in preparation of 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, if applicable.
Additional scientific information
No additional data are required at this time.
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