Alaska Bans Invasive Prunus Trees

State officials have barred the import, transport, and sale of two fast-growing invasive species that were once popular garden ornamentals but have now wreaked havoc on natural vegetation.

The Alaska Division of Agriculture on Friday issued a quarantine for the two species: Prunus padus, commonly known as the European bird cherry tree or mayday tree, and Prunus virginiana, commonly known as the Canada red or chokecherry tree.

the order went into effect Monday.

In essence, it will extend through the state a ban that was previously in place in the Matanuska-Susitna Borough. These trees aggressively spread,outcompeting native plants and disrupting ecosystems.

“These trees are highly adaptable and spread quickly, forming dense thickets that displace native vegetation,” said Anthony Scalzo, plant health program manager with the Division of Agriculture, in a statement. “They’re difficult to control once established, and their spread poses a significant threat to Alaska’s biodiversity.”

The Division of agriculture began considering the statewide ban after observing the trees’ increasing presence in Southcentral Alaska and receiving reports of their invasive behavior from local communities and land managers.

The quarantine prohibits the import, transport, sale, and distribution of the two Prunus species, including live trees, seeds, and other propagative materials. Exceptions might potentially be granted for scientific research or other specific purposes with prior approval from the Division of Agriculture.

Landowners who currently have these trees on their property are not required to remove them, but are encouraged to do so. The Division of Agriculture offers resources and guidance on effective removal methods.

Key Takeaways

• Species Banned: Prunus padus (European bird cherry/mayday tree) and Prunus virginiana (Canada red/chokecherry tree).
• Effective Date: Monday, following the Friday declaration.
• Scope: Statewide ban on import, transport, sale, and distribution.
• Existing Trees: Landowners aren’t required to remove existing trees, but removal is encouraged.
• Why the Ban: These trees are highly invasive, outcompeting native plants and disrupting ecosystems.

The Alaska Department of Natural Resources provides additional facts on invasive species in Alaska, including identification guides and control methods.

Published: 2025/09/03 12:01:34