EAB Infestation Map

Below is the current map of EAB infestation across North America. The most recent additions to the infestation map are British Columbia (May 2024) and North Dakota (August 2024). An up-to-date map is available on our website.

Map of north america highlighting where emerald ash borer has spread

National Invasive Species Awareness Week Feb. 24-28

February 24-28 Support National Invasive Species Awareness Week NAISMA NISAW National Invasive Species Awareness Week

National Invasive Species Awareness Week is an international event dedicated to raising awareness about invasive species, the threats they pose, and actions to prevent their spread. NAISMA will host a series of webinars featuring speakers from organizations such as the US Geological Survey, US Army Corps of Engineers, Environmental Protection Agency, OH-SMART/One Health, VIDA Intergovernmental Response Framework, USDA APHIS, and more. For information and webinar schedules, visit the NISAW website >

Curious About Other Invasive Insects?

The Emerald Ash Borer (EAB) has devastated millions of ash trees, disrupting ecosystems and costing hundreds of million dollars in damages. But EAB is just one of many invasive species threatening forests, agriculture, and waterways. Keep reading to learn more about these growing threats:

Spotted Lanternfly (SLF)

SLF is an invasive insect from China that feeds on the sap of a wide variety of plants, including forest trees, such as black walnut, maple, birch, and willow, as well as important agricultural crops, such as grape, hops, apple, and cherry. To feed, this insect inserts its straw-like mouthpart through the plant’s bark, which creates wounds allowing plant diseases a point of entry. Large numbers of SLF feeding can lead to plant stress, reduced health, and in some cases death. Read more about SLF >

Asian Longhorned Beetle (ALB)

ALB is a wood-boring insect that feeds on a wide variety of hardwood trees, such as maple, elm, birch and willow, eventually killing them. In the larval stage, this insect feeds on the nutrient rich tissues beneath the bark of tree, disrupting the flow of nutrients to the tree’s canopy, and into the heartwood of the tree, compromising the structural integrity of the wood. Since its initial detection in New York, ALB infestations are located mostly in the Eastern and Midwestern United States. Read more about ALB >

Hemlock Woolly Adelgid (HWA)

HWA is an invasive insect from Japan that feeds on the sap of hemlock trees. It currently can mostly be found in the Appalachian Mountains and their surrounding areas, however it is spreading beyond Appalachia into Ontario and Michigan. This insect feeds by inserting its straw-like mouthparts into the base of the hemlock needles and sucking the nutrient rich sap out of the shoot. Read more about HWA >

Check out the EAB Information Network Website to learn more about other invasive species!

Recent News

New Research on Asian Parasitoids

A new study found that introducing Asian parasitoids didn’t harm the 4 native parasitoids in Michigan—a key finding for future EAB biocontrol. Read the study >

Ash tree variability may offer restoration path post-beetle decimation

In response to EAB, researchers at Penn State are working to identify and develop ash trees genetically able to withstand EAB. Continue reading >

Effectiveness of canine-assisted surveillance and human searches for early detection of invasive spotted lanternfly

A recent study shows dogs are 3.4x better at sniffing out invasive Spotted Lanternfly egg masses in forests, where eggs are harder to spot visually than on vinyards. Read the study >

Fridays with a Forester

University of Minnesota Extension will host a webinar on Minnesota ash woodlands & EAB on Friday, Feb. 14.

This is part of a forestry series, Fridays with a Forester, running through April. Learn more and register >

EAB Network Updates

EAB University Webinars: Coming Soon

We’re preparing for the next round of EAB University webinars, but recent changes at the federal level have impacted speaker availability. We’re adjusting our plans and will share the schedule as soon as it’s finalized. Stay tuned!

EAB Network is on Bluesky!