Emerald Ash Borer

  • Adult EAB on a penny
    Adult EAB on a penny
  • Larvae in an ash tree
    Larvae in an ash tree
  • Damage caused by EAB larvae
    Damage caused by EAB larvae
  • D shape EAB exit holes
    D shape EAB exit holes
  • Adult EABs emerging from an Ash tree
    Adult EABs emerging from an Ash tree
  • Ash tree die off from EAB, 2006 (left) to 2009 (right)
    Ash tree die off from EAB, 2006 (left) to 2009 (right)
  • EAB trap
    EAB trap

Emerald Ash Borer

Agrilus planipennis Ledeb.

Order: 
Coleoptera
Family: 
Buprestidae

Report a Sighting

Description

Emerald Ash Borer has been confirmed in 2 locations in Omaha, NE and in Greenwood, NE. Quarantines are now in place. Learn more here.

Also referred to as EAB, Emerald Ash Borers are wood boring insects with a one year lifecycle. They are metallic green with bronze on the head and under the elytra. About 13 mm long, indented along the elytra. Larvae are milky white with triangular segments. Adults lay eggs under the bark of ash trees. The larvae eat the tissues of the tree as they grow. Once they are mature the larvae exit the tree by boring a D shaped hole in the bark to escape. The D shaped exit hole is one way used to find an EAB infestation.

Host Plants

All species of Ash trees (Fraxinus spp.)

Location in Nebraska

The Nebraska Department of Agriculture (NDA) has confirmed that emerald ash borer (EAB) was discovered during a site inspection in Omaha‚Äôs Pulaski Park on June 6, 2016. Nebraska becomes the 27th state to confirm the presence of EAB, joining neighboring states of Iowa, Missouri, Kansas and Colorado. NDA has issued a quarantine prohibiting ash nursery stock from leaving the quarantine area. The quarantine also regulates the movement of hardwood firewood and mulch, ash timber products and green waste material out of the quarantine area. View quarantine map here.

Treatment Options

It is not recommended to chemically treat ash trees to prevent Emerald Ash Borer unless the tree is locate from Fort Calhoun to Plattsmouth and from Gretna and east of Council Bluffs (see map above). There is a limited number of times many trees can be chemically treated so waiting until you are in the quarantine area will maximize the amount of times you can treat the tree. The yearly window of time that is recommended for treating an ash tree is closing. If a tree is treated any time after mid-June the chemical will not distribute throughout the tree as much as it would have earlier in the spring so it would be best to wait until next year. Learn more here. There are 3 species of wasp being used in many states including Michigan since 2007. View this fact sheet for more information.

Symptoms

Top dieback and increased woodpecker damage. 1/8 inch D-shaped borer holes along the trunk. Suckering occurring at the base of the tree. Larval galleries under the bark. If you find a small D shaped hole or have an ash tree declining and want it inspected for emerald ash borer contact us on the report a sighting page. Download fact sheet here.

Pathway of Introduction and Spread

Originally introduced from Asia. First found in Michigan in 2002. Spreads through the movement of ash wood products and on vehicles from infested areas. There are state and federal quarantines in place to prevent the spread of EAB by preventing the transport of ash tree products. Refer to this website to learn more about these quarantines.

Photo Credits: 

Center for Invasive Species and Ecosystem Health