The primary hosts of oak splendour beetle are oaks. Infestations are found occasionally in European beech and chestnut. Infestations in the North American red oak, planted within the geographic range of the oak splendour beetle are rare. Several records exist of this insect attacking poplar. These are considered doubtful, however. Infestations in the North American red oak planted within the geographic range of the oak splendour beetles, are rare.
Oaks, the primary host of oak splendour beetles, are important trees for lumber, flooring and cooperage. They are also popular ornamental trees in urban settings. This insect is potentially capable of causing severe damage to oak forests. Oak splendour beetle adults are relatively strong fliers, capable of flying several km in search of suitable hosts. This insect could also be spread via unprocessed oak logs or wood products containing strips of bark. Newly established populations could go undetected for a number of years because of the insect's cryptic nature and the fact that the genus Agrilus is well represented in North America.
The oak splendour beetle is not known to occur in Indiana.