Re-evaluation Note REV2017-21, Re-evaluation Project Plan for Fenhexamid

Pest Management Regulatory Agency
3 August 2017
ISSN: 1925-0649 (PDF version)
Catalogue number: H113-5/2017-21E-PDF (PDF version)

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In Canada, fenhexamid is under re-evaluation by Health Canada’s Pest Management Regulatory Agency (PMRA). The PMRA re-evaluates registered pesticides to determine whether the use of these products continues to be acceptable in terms of value, human health and the environment according to current standards.

Fenhexamid is a fungicide registered for use on fruit crops, greenhouse vegetables, and greenhouse and outdoor ornamentals. As of 7 June 2017, there are one technical and two commercial class end-use products containing fenhexamid registered in Canada.

Under the authority of section 16 of the Pest Control Products Act, the registrant of fenhexamid was notified of the initiation of the re-evaluation of fenhexamid. Following this, the registrant of fenhexamid technical grade active ingredient in Canada indicated support of all uses included on the labels of end-use products in Canada.

The re-evaluation project plan below outlines the timeline, the anticipated areas of focus for the risk assessments, and the data requirements for the re-evaluation of fenhexamid.

Re-evaluation Project Plan

Anticipated Re-evaluation Timeline

The re-evaluation of fenhexamid is defined as a Category 1 as described in Regulatory Directive DIR2016-04, Management of Pesticides Re-evaluation Policy. However, because this re-evaluation was initiated prior to the publication of DIR2016-04, the proposed re-evaluation decision for fenhexamid is anticipated to be published for consultation by September 2019. The re-evaluation timeline may be updated if, during the risk assessment, the PMRA identifies additional areas of focus that should be considered.

Human Health Risk Assessment

New assessments will be conducted for toxicology, dietary exposure, occupational exposure and residential exposure.

Environmental Risk Assessment

New assessments will be conducted for environmental fate, water modelling and environmental exposure.


The value of fenhexamid will be considered. The viability of alternatives will be examined for certain uses if risks of concern which require mitigation are identified.

Data Requirements

The PMRA has identified the need for the technical registrant to provide data for fenhexamid related to toxicology, occupational, residential and bystander exposure, dietary exposure, environmental chemistry and fate, and environmental toxicology. Relevant data/studies have been requested from the technical registrant. A summary of the data call-in is found in the PMRA’s Public Registry. For a list of data categories that have been required, see Appendix I. In addition, information regarding the registered use pattern has been requested from the registrant, to inform the risk assessments.

Additional Information

PMRA documents can be found in the Pesticides and Pest Management portion of The PMRA documents are also available through the Pest Management Information Service.

Appendix I Data Required Under Subsection 19(1) of the Pest Control Products Act for the Re-evaluation of Fenhexamid

I.   Toxicology Data

  • DACO 4.2.6   Dermal Sensitization
  • DACO 4.3.1   Short-term Oral (90-day rodent)
  • DACO 4.3.7   Short-term Inhalation (21/28-day)
  • DACO 4.5.4   Genotoxicity Bacterial Reverse Mutation Assay
  • DACO 4.5.8   Other Genotoxicity Studies
  • DACO 4.8   Other Studies/Data/Reports
  • DACO 12.7   Comprehensive Data Summaries (if available)

II. Occupational, Residential and Bystander Exposure Data

  • DACO 5.8  Dermal Absorption (in vivo)
  • DACO 5.9   Dislogeable Residues (Foliar, Soil and Surface)
  • DACO 12.7  Comprehensive Data Summaries (if available)

III.Dietary Exposure Data

  • DACO 7.4.1 Supervised Residue Trial Studies
  • DACO 12.7  Comprehensive Data Summaries (if available)

IV.     Environmental Chemistry and Fate Data

  • DACO  Biotransformation in Soil - Aerobic Soil 20°-30°C
  • DACO  Biotransformation in Aquatic Systems - Aerobic Water/Sediment 20°‑30°C
  • DACO Biotransformation in Aquatic Systems - Anaerobic Sediment/Water 20°‑30°C

V. Environmental Toxicology Data

  • DACO   Bee Larvae Toxicity
  • DACO   Bee Adult Chronic Toxicity
  • DACO 9.3.4   Non-Target Freshwater Invertebrates - Laboratory Studies with Other Species
  • DACO 9.4.2   Non-Target Marine Invertebrates - Acute (Crustacean)
  • DACO 9.4.5   Non-Target Marine Invertebrates - Chronic (Mollusk or Crustacean)
  • DACO 9.8.2   Non-Target Plants - Fresh Water Algae
  • DACO 9.8.3   Non-Target Plants - Marine Algae
  • DACO 9.8.4   Non-Target Plants - Terrestrial Vascular Plants
  • DACO 12.7.4  Comprehensive Data Summaries (if available)
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