The emerald ash borer has been discovered in two trees located at the intersection of Goodale Boulevard and Elmwood Avenue.

The emerald ash borer has been discovered in two trees located at the intersection of Goodale Boulevard and Elmwood Avenue.

It appears the insect invaded the trees about two years ago, city arborist Michael McKee said.

"It's really difficult to detect them in their early stages," he said.

Residents should be on the lookout for signs their ash trees may have been infested by the borer, McKee said.

"If you want to start treating your ash tree, you need to start immediately," he said.

The emerald ash borer is an invasive wood-boring insect that infests native North American ash trees in forests and landscape plantings. It is capable of eliminating an entire tree species from forests and cities.

Adults borers are elongated, half-inch beetles with a metallic green color. Adults emerge from late May through early August, with emergence peaking in late July.

"It bores in the cambium layer of the tree, which is the living part of a tree," McKee said. "It bores in a serpentine manner."

According to the Ohio Department of Agriculture, symptoms of ash borer infestation include:

Distinct D-shaped exit holes in the bark.

Serpentine-shaped tunnels under the bark on the surface of the wood.

Young sprout growth at the base of the tree.

Unusual activity by woodpeckers.

Thinning canopy of the tree.

Vertical splits in the bark.

The cost of removing or treating ash trees is increasingly falling to local government and land owners after recent federal and state budget cuts, McKee said.

The two infected trees at Goodale and Elmwood have not been removed yet and are being treated, he said.

There are several ash trees located between them, but it is not known yet if they have been infected, McKee said.

The borer can kill a tree within three to four years, he said.

About 200 ash trees have been identified on city property, McKee said.

The city began implementation of a emerald ash borer management plan in 2007 by removing about 15 percent of its street and park ash trees and planting other trees in their place, he said. The city has continued to remove and replace some trees while treating others.

Grandview is now under state and federal quarantines that prohibit the movement of all firewood from quarantined to non-quarantined counties, he said. Movement of firewood is permitted within quarantined counties.

More information about treating trees can be found at www.ohioagriculture.gov/eab and www.ashalert.osu.edu.

McKee can also be reached at 481-6201.