EAB Infestation Map

Below is the current map of emerald ash borer (EAB) infestation across North America. Mississippi was added on Nov. 14, 2025. EAB is now present in 38 states and six Canadian provinces. An up-to-date map is available on our website.

February 23-27 is National Invasive Species Awareness Week

This year, the North American Invasive Species Management Association (NAISMA) is offering a great lineup of webinars and events from February 23-27, 2026. The 2026 theme, “Defending Our Health by Stopping the Spread,” highlights the importance of preventing invasive species introductions and impacts. Visit the NAISMA website for more information.

USGS Invasive Species Science: Innovation for a Healthy Nation

Feb. 23, 2026

2 - 4 p.m. ET

Alberta Wild Boar Control Program: Challenges and Successes

Feb. 24, 2026

2 - 3 p.m. ET

Current Situation of the New World Screwworm in Mexico

Feb. 25, 2026

2 - 3 p.m. ET

The Surprising Intersection between Marine Invasive Species and Public Health

Feb. 26, 2026

2 - 3 p.m. ET

Invasive Species Threaten American Food Security

Feb. 27, 2026

2 - 3 p.m. ET

Recent EAB News

EAB detected in Fargo, ND

On Jan. 27 an EAB larva was found in the City of Fargo by city forestry staff. This is the first detection in Cass County and the second finding in North Dakota. The first detection in the state was in LaMoure County in August 2024.

Deep Freeze Could Kill EAB Larvae

There may be a silver lining to January's arctic blast in the Midwest: It helps reduce EAB populations. But such temperatures are common in areas already heavily affected by EAB, including Michigan’s Keweenaw Peninsula and parts of Minnesota, where ash mortality remains high. This winter’s cold snaps may kill some larvae, but EAB populations will persist and adults will still emerge this summer.

Minnesota DNR releases annual forest health report

Minnesota's 2025 Forest Health Annual Report reports EAB expanded into six additional counties, bringing known infestations to 59 of Minnesota's 87 counties.

Other News

New Rapid Test Helps Detect Beech Leaf Disease in Minutes

Researchers have developed a rapid, field‑ready test that detects the beech leaf nematode (the cause of beech leaf disease) in less than 30 minutes. The new dipstick‑style assay is highly sensitive and works on both nematode and leaf samples, giving forestry and plant health professionals a practical tool for quick, on‑site diagnosis.

Not If, But When: The Growing Need for Invasive‑Species Research in the Southeast U.S.

Florida and the broader Southeast are seeing rapid introductions of non‑native arthropods. A new two‑volume collection aggregates 16 studies on invasive arthropods in the Southeast, from first detections and diagnostics to spread and management. Highlights include an inventory of 450 adventive species in Florida (1990–2023), new ID tools, and practical tactics like sanitation and biological control.

Washington to ban untreated firewood from other states

The Washington State Department of Agriculture plans to ban untreated firewood from other states to prevent the introduction of invasive insects, including EAB which was discovered in Oregon in 2022 and British Columbia in 2024. The proposal would put Washington alongside states like Michigan, which recently proposed a similar ban.

Why invasive spotted lanternflies are thriving in the US

Even with extremely low genetic diversity from a single introduction, the spotted lanternfly populations have rapidly expanded. Scientists say its pre‑adaptation to city habitats, combined with high reproductive output, has allowed the lanternfly to quickly adjust to new climates and ecosystems, fueling its continued spread.

Spotted lanternfly confirmed in additional counties in North Carolina and Kentucky

The North Carolina Department of Agriculture and Consumer Services has confirmed established spotted lanternfly populations in Davidson, Rowan and Caswell counties, bringing the state’s total to seven affected counties. The Kentucky Office of the State Entomologist has also reported detections in eight additional Kentucky counties.