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Plant Pest Quarantines

MDARD helps safeguard Michigan agriculture and natural resources against the introduction, establishment, and spread of harmful pests through plant pest quarantines. Plant pest quarantines are legal documents issued by MDARD limiting the movement of specific plant material within, into, or out of the state of Michigan.

Interior plant pest quarantines restrict the movement of specific plant material within the state of Michigan. Exterior plant pest quarantines restrict the movement of specific plant material into the state of Michigan from other states where a plant pest is known to exist.


A balsam woolly adelgid infestation
Ronald F. Billings, Texas A&M Forest Service,

A hemlock woolly adelgid infestation
USDA Forest Service – Southern Research Station – USDA Forest Service, SRS,

Suspected quarantine violations can be reported by emailing or by calling 800-292-3939.

Plant Pest Quarantines in Michigan:

Balsam Woolly Adelgid Exterior Quarantine

Blueberry Scorch, Shock & Sheep Pen Hill Virus Exterior Quarantine

Box Tree Moth Interior Quarantine - NEW!

Chestnut Gall Wasp Exterior Quarantine

Hemlock Woolly Adelgid Exterior Quarantine

Hemlock Woolly Adelgid Interior Quarantine

Mountain Pine Beetle Exterior Quarantine

Scleroderris Exterior Quarantine

Thousand Cankers Disease of Walnut Exterior Quarantine

MDARD also provides a summary of Michigan quarantine regulations relating to nursery stock. 


White Pine Blister Rust Act 313 of 1929 requires a permit from MDARD to plant red currants, white currants & gooseberries the control area. A map of the control area and approved varieties are listed here. Planting of black currant is prohibited statewide except under permit. MDARD will only approve resistant varieties for permits. To request a permit, please fill out this form.