Pest Information for Montana

Last Modified: March 29, 2024

Active Federal Quarantines

The following pests have Federal quarantines in certain areas of this State. Other Federal and State quarantines may apply. Learn about State-level quarantines.

There are no Federal quarantines right now.

Watch Out For These Pests

This state has some crop, forest, or urban area(s) where the following pests or diseases could survive year-round.

Attacks: hardwood trees, national forests

Balanced on an index finger the Asian longhorned beetle's face is dwarfed by its long black and white banded antenna. The distinct bluish color on the ALB's legs and feet—a sign of a newly emerged adult.

Attacks: ash trees

Close up of an adult emerald ash borer on bark of a tree; beetle is bright, metallic green, measures about one-half inch long and has a flattened back.

Attacks: North American tree and shrub species

White female moth with light brown lines on its wings next to brown male moth with dark brown lines on its wings.

Attacks: trees and shrubs

Dark-colored, hairy caterpillar with five pairs of blue dots followed by six pairs of red dots lining its back crawling on a partially eaten leaf.

Report a Pest

Have you recently encountered the listed pests or any invasive species?

If so, contact the State Plant Health Director below:

Montana State Plant Health Director

Gary Adams

Email: gary.d.adams@usda.gov

Phone: 406-657-6282

Fax: 406-657-6293

Mailing Address:

1400 South 24th St. West

Suite 8A

Billings, MT 59102