Pest Information for Delaware

Last Modified: July 30, 2025

Hawaii (includes America Samoa, Commonwealth of the Northern Mariana Islands, and Guam)

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.

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.

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: Sweet and tart cherries, and other environmental host such as honeysuckle and dogwood

European cherry fruit fly adult on a ripening cherry.

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: buds and fruits of crop plants

Red imported fire ant crawling on young tree branch.

Attacks: fruit, ornamental and woody trees

Adult spotted lanternfly with wings spread caught in a spider web.

Report a Pest

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

If so, contact the State Plant Health Director below:

Delaware State Plant Health Director

Darryl Moore

Email: darryl.c.moore@usda.gov

Phone: 302-744-1800

Fax: 302-734-7814

Mailing Address:

500 West Loockerman St.

Suite 310

Dover, DE 19904

Office Manager:
Laura Rupert: (302) 744-1800
Email: laura.rupert@usda.gov

Associate Executive Director:
Christina Devorshak: (919) 855-7547