Emerald Ash Borer (EAB)
EAB has NOT been detected in North Dakota.
Unfortunately, it is believed that EAB may reach the state in the coming years.
|EAB Larvae Photo by David Cappaert,
Michigan State University
|EAB larval galleries Photo by David Cappaert, Michigan State University||Adult EAB Photo by Pennsylvania Department of Conservation and Natural Resources - Forestry Archive te University||EAB Exit Hole Photo by David Cappaert, Michigan State University|
Life Cycle and Identification
EAB adult females lay their eggs on the bark of the tree. Eggs are very small (less than 1mm) and rarely observed. Once hatched, the larvae tunnel their way into the tree where they feed beneath the bark creating serpentine galleries. Larvae are up to 1.25 inches long, creamy white and have several bell shaped segments. In the spring the EAB will pupate beneath the bark and emerge as an adult. The adult EAB will chew its way out of the tree creating D-shaped exit holes that are approximately 3-4mm in diameter. Adult EAB are 0.3-0.53 inches long with metallic green elytra (wing coverings).
While feeding beneath the bark of the tree the larvae disrupt the flow of nutrients throughout the tree. Once infested an ash tree can die in as little as 2 years. There are insecticide treatments available however they are costly, treat individual trees and most need to be repeated every year. Insecticide treatment is not recommended until EAB infestations are within 15 miles of your location (NDDA, NDFS, NDSU Extension position statement on insecticide use). Currently the closest EAB has been found to North Dakota is near Minneapolis/St. Paul, Minnesota.
ND Department of Agriculture in cooperation with the ND Forest Service and USDA APHIS PPQ hang EAB traps all across the state each year to monitor for this pest. EAB trap locations.
For more information on EAB biology and management check out the NDSU Extension Publication “Emerald Ash Borer Biology and Integrated Pest Management in North Dakota”.
What you can do to prevent the introduction and spread of EAB:
• Watch for signs and symptoms of EAB in your ash trees. If you suspect your ash trees could be infested with EAB,
contact the North Dakota Department of Agriculture at 701-239-7295 or 701-328-4765.
• Don’t transport firewood into North Dakota and encourage your friends and relatives to refrain from bringing firewood into the state.
Emerald Ash Borer Biology and Integrated Pest Management in North Dakota
Insects Frequently confused with EAB in ND
Ash Identification Guide
Signs and Symptoms of EAB
NDSU Extension EAB Video
Insect galleries of EAB and other Ash Borers
Firewood Identification Guide
National EAB Information Website
USDA Forest Service Emerald Ash Borer
Pest Tracker – EAB