The Emerald Ash Borer (EAB), Agrilus planipennis, is a beetle derived from Asia. It is a wood boring insect that can wipe out a whole ash tree. It was discovered in the     U. S. back in 2002, in southeastern Michigan as the widespread cause of tree decline & mortality. EAB made it`s presence known here in Missouri back in thesummer of 2008. Once a tree is infested it`s hard to handle the pest.

EAB adults are ½ long with a dark metallic green coloring with a bullet like shape.  Adult beetles come from the bark of the tree in May and early June. They are usually active during warm, sunny weather. They mostly feed on the leaves and don`t cause much harm to the tree. They will lay eggs in bark crevices. The EAB larvae is white in color and has a segmented body. It feeds on the sapwood underneath the bark. S-shaped patterns will be created as it tunnels its way through the tree. Trees will then not be able to pass nutrients and water through the canopy. Causing limb die-backs and eventually death to the tree. The EAB larvae cannot be seen without removing the bark from the tree.

EAB only attack ash trees. Ash trees account for about 3% of Missouri`s native forests. The numbers get higher as you get into urban areas and neighborhoods. Once an area has been attacked, the dead tree has to be removed which can be costly. This is a little beetle that can have an effect on a whole community. In 2013, Missouri is under quarantine to prevent the accidental spread of the beetle.

Some Things to Know:

•EAB only attacks Ash Trees

•Adults are metallic green and about ½ in. long. They leave a D-shaped exit hole in the bark.

•Woodpeckers love EAB larvae for lunch, heavy woodpecker damage on ash tree is a possible sign of infection

•Firewood cannot be moved in many areas.

If you suspect your ash tree may be infected contact us of or your local Missouri extension office.



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