To prevent the spread of hemlock woolly adelgid, we set rules on moving potentially infested materials.
If you move these materials from controlled areas without our approval, you could be fined or face legal consequences. If hemlock woolly adelgid is found on a property, a Movement Prohibition Notice stops the movement of affected materials from that location.
On this page
Regulated areas
Text version – Map of infested places with the hemlock woolly adelgid
British Columbia
The entire province
Nova Scotia
The entire counties of Kings, Lunenburg, Digby, Queens, Shelburne, Yarmouth and Annapolis
Ontario
The entire regional municipality of Niagara, county of Haldimand, the City of Hamilton and the township of Alnwick/Haldimand in the province of Ontario.
Regulated items
Items that cannot be moved out of the regulated areas without approval include:
- hemlock, yeddo spruce, and tiger-tail spruce:
- plants for planting (that is, nursery stock, and other plant parts)
- forest products with bark attached (that is, logs, lumber, bark chips, wood mulch)
- dried branches
- Christmas trees
- fresh decorative wreaths, foliage and branches
- firewood of all species
If you need to move regulated materials outside of a regulated area, contact your local CFIA office.
List of detections and regulatory updates
| Date | Activity | Location | Province | Description |
|---|---|---|---|---|
| 2025 | Expansion of regulated area | Regional Municipality of Niagara, Haldimand County, the City of Hamilton and the Township of Alnwick/Haldimand | Ontario | News release: More areas in Ontario now regulated for the hemlock woolly adelgid insect |
| 2025 | Detection | Norfolk County | Ontario | This detection was flagged through monitoring by Norfolk County forestry staff. |
| 2025 | Detection | Greater Toronto Area | Ontario | This detection was flagged through monitoring conducted by City of Toronto forestry staff. |
| 2025 | Detection | St. Catharines | Ontario | This detection was flagged through routine monitoring and partner survey. |
| 2024 | Detection | Thorold | Ontario | This detection was flagged by a citizen report. |
| 2024 | Detection | Port Colborne | Ontario | This detection was flagged through routine monitoring. |
| 2024 | Detection | Halifax County | Nova Scotia | Two detections were flagged through Nova Scotia Department of Natural Resources and partner surveys. |
| 2023 | Detection | Halifax County | Nova Scotia | This detection was flagged by a citizen report. |
| 2023 | Detection | Haldimand County | Ontario | This detection was flagged through routine monitoring. |
| 2023 | Detection | Lincoln | Ontario | This detection was reported by the Ontario Ministry of Natural Resources (OMNR). |
| 2023 | Detection | Hants County | Nova Scotia | This detection was flagged by partner survey. |
| 2023 | Detection | Hamilton | Ontario | This detection was flagged by citizen report and partner survey. |
| 2022 | Detection | Grafton (Township of Alnwick-Haldimand) | Ontario | Flagged by a Canadian Forest Service (CFS) partner survey. |
| 2022 | Detection | Pelham | Ontario | This detection was flagged through routine monitoring. |
| 2022 | Expansion of Regulated area | Town of Fort Erie, Kings and Lunenburg Counties | Ontario and Nova Scotia | News release: Expansion of the regulated areas for hemlock woolly adelgid in Nova Scotia and Ontario |
| 2021 | Detection | Fort Erie | Ontario | This detection was flagged through routine monitoring. |
| 2021 | Detection | Kings County | Nova Scotia | This detection was flagged through routine monitoring. |
| 2020 | Detection | Lunenburg County | Nova Scotia | This detection was flagged through routine monitoring. |
| 2020 | Expansion of Regulated area | Wainfleet and Niagara Falls | Ontario | Wainfleet and Niagara Falls were added to the Ministerial Order. |
| 2019 | Detection | Wainfleet | Ontario | This detection was flagged through routine monitoring. |
| 2019 | Detection | Niagara Falls | Ontario | This detection was flagged through routine monitoring. |
| 2017 | Detection & Expansion of Regulated area | Southwestern Nova Scotia | Nova Scotia | The Ministerial Order was created to add 5 counties (Digby, Queens, Shelburne, Yarmouth and Annapolis) in the Province of Nova Scotia and the entire province of British Columbia. |
| 2015 | Detection | Niagara Falls | Ontario | This detection was flagged through routine monitoring. |
| 2013 | Detection | Niagara Falls | Ontario | This detection was flagged through routine monitoring. |
| 2012 | Detection | Etobicoke | Ontario | Observed by arborist on small number of trees in residential area.; affected trees were removed. |