Health Canada is consulting Canadians on the proposal to continue registration of all products containing nucleopolyhedrovirus for Douglas-fir tussock moth and Neodiprion abietis nucleopolyhedrovirus registered for sale and use in Canada, with proposed label updates.

Nucleopolyhedrovirus for Douglas-fir tussock moth and Neodiprion abietis nucleopolyhedrovirus are naturally occurring baculoviruses, registered in Canada for use as microbial pest control agents. Nucleopolyhedrovirus for Douglas-fir tussock moth is used for the control of Douglas-fir tussock moth and the suppression of white marked tussock moth on forest trees, in woodlands, along rights-of-way, in tree nurseries, in seed orchards, and in areas that are less than half a hectare with high-value trees or ornamental trees. Neodiprion abietis nucleopolyhedrovirus is used for the management of balsam fir sawfly larvae (Neodiprion abietis) in forestry sites and on field-grown conifers, including Christmas trees.

When the current label directions are followed, these products were shown to have value in providing a pest management solution, and potential risks to human health (occupational and bystander) and the environment are considered to be acceptable. Label updates are proposed to meet the current labelling standards. Label updates include updates to personal protective equipment, first aid, spray drift, and disposal label statements, and the addition of a re-entry interval.

For a full list of products containing nucleopolyhedrovirus for Douglas-fir tussock moth and Neodiprion abietis nucleopolyhedrovirus, please consult Appendix I in the Proposed Re-evaluation Decision or visit the Pesticide Label Search database.

For more information on the proposed decision open the “Proposed Re-evaluation Decision”.

How to get involved
This consultation is open for comment from 26 October 2022 to 24 January 2023 (90 calendar days).

To comment on PRVD2022-20:

Step 1 Request the full consultation document to read the Science Evaluation that is the basis of this proposed regulatory decision.
Step 2 Submit comments to the PMRA Publications Section.

All comments received will be considered. A final re-evaluation decision will consider additional scientific information provided during the public comment period.

Please refer to the document title (for example: Proposed Re-evaluation Decision PRVD2022-20, Nucleopolyhedrovirus for Douglas-Fir Tussock Moth and Neodiprion abietis Nucleopolyhedrovirus, and Their Associated End-use Products) when providing comments.

Reporting to Canadians
Health Canada will make the results of this consultation available on this website. Once the decision is finalized, the PMRA will post a Re-evaluation Decision on the Pesticides and Pest Management Reports and Publications portion of

If you have any questions, contact the Pest Management Information Service.

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