Oak Splendor Beetle

The oak splendor beetle, Agrilus biguttatus, is native to many different European countries. It is thought to have been introduced to the Unites States by wooden packaging material and crates. Like the name implies, the oak splendor beetle prefers to attack oak trees; however, it can also infest chestnut and beech trees as well.

Like many other beetles of its genus, it is long and slender with a metallic sheen. An easy identifier are the pairs of white spots on the ends of its wing covers. Afflicted trees will develop epicormic shoots, a thin crown, and branch and twig dieback. It can also leave D-shaped exit holes and zig-zag galleries on infested hosts. Damage done to the cambium by the larvae eventually results in the death of the tree.

Much like its cousin the emerald ash borer, it can fly great distances to find a suitable host. After finding a suitable tree, the female will commonly deposit its eggs on the sunnier side of the tree. In warmer conditions, the beetle can have up to one generation a year with adults emerging around mid-spring.

Oak splendor beetle is a greenish metallic beetle with two spots on the back of its bullet shaped body.If you suspect you have found an oak splendor beetle or an infested oak tree, please contact DPI at invasives@clemson.edu or 864-646-2140.

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