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Quinoxyfen Proposed Registration Decision

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FREQUENTLY ASKED QUESTIONS (FAQs)

  1. Why is the PMRA proposing to cancel the use of Quintec?

    The PMRA has found Quintec meets the criteria for Track 1 substances under the Toxic Substances Management Policy. This means the PMRA has concluded Quintec is persistent in soil and bioaccumulates in aquatic organisms. Dow AgroSciences will be challenging this finding, as we believe Quintec can be safely used with the inclusion of risk mitigation measures to address the hazards that have been identified.

  2. Does it harm the environment?

    When used according to label directions, Quintec does not pose unacceptable risks to humans or terrestrial organisms.

    The risk to aquatic organisms originates primarily from spray drift or runoff from treated fields, these risks can be minimized through the incorporation of risk mitigation measures such as buffer zones or shrouded sprayers. Quintec is sprayed on leaves where it’s quickly absorbed, thus minimum quantities reach the soil. Quintec binds strongly to the soil thus there is no risk of leaching to groundwater. In water, Quintec is not highly persistent and binds quickly to sediment.

    As required under the Pest Control Products Act, the PMRA receives incident reports or complaints about products that adversely affect health or the environment. The general public, medical community, government and non-governmental organizations are able to report directly to the PMRA. In the past 10 years, there have been no Quintec incidents reported to the PMRA.

  3. What alternatives exist?

    Of all the alternative products that the PMRA has identified, Quinoxyfen is the only group 13 (FRAC) protectant. For some crops such as hops, options are limited and growers are only left with two viable alternatives.

  4. Is Quintec registered in the United States?

    Yes, Quintec is registered in the United States by the EPA.

    If the PMRA cancels all uses of Quintec, Canadian farmers will be technologically disadvantaged because its use in the United States remains unchanged.

  5. What measures can be taken to reduce the impact to the environment?

    Spray buffer zones are required to protect aquatic biota as well as other risk mitigation measures as included in Quintec’s label.

  6. Why is Quintec important?

    Quintec is designed with a specific purpose, to effectively prevent powdery mildew. Because it has a unique mode of action, growers rely on Quintec as an important rotational product to prevent resistance development. Quintec provides robust and long lasting protection against powdery mildew on stone fruits, grapes, strawberry, melon, squash, lettuce and hops.

  7. What makes Quintec unique?

    Quintec is the only class 13 fungicide and has a unique mode of action. It is a highly effective treatment to protect crops from powdery mildew.

    There are no known resistance issues with Quintec, so growers can rely on it to prevent powdery mildew and effectively manage the development of resistance.

  8. How do growers use it in Canada?

    When environmental conditions are favourable for powdery mildew development, Quintec can be sprayed on the crops where it penetrates into the leaves and forms a protective barrier. Quintec protects the crops for up to two weeks.

    Quintec efficacy is not compromised by temperature fluctuations, making it a good choice for early and/or late season applications.

  9. Has the PMRA consulted with user groups before now?

    No, the PMRA has not consulted with user groups before this decision was published. Consultation is open now until February 18, 2018.

  10. How do I contact the Pesticide Management Regulatory Agency?

Email your comments to the Pesticide Management Regulatory Agency (PMRA) at pmra.publications@hc-sc.gc.ca before February 18, 2018.

Be sure to include your name, province and postal code. Let them know you are responding to Proposed Registration Decision PRD2018-01, Quinoxyfen