Invasive Beetle Species

Asian Long-Horned Beetle

A long-horned beetle has been discovered attacking ornamental trees in New York City and Chicago. Warehouse detections of this pest have been made in most states in the northeastern portion of the United States as...

Elm Leaf Beetle

Elms are a common shade tree planted throughout the U.S. and are valued for their large, high canopies and the shade they provide. The elm leaf beetle was accidentally introduced into the U.S. in the 1830s and is...

Eucalyptus Leaf Beetle

Eucalyptus leaf beetle is a new pest of ornamental eucalyptus and was introduced from Australia into southern California around 2003. It is not easily controlled by native parasites or predators. In Australia it is commonly known as...

Eucalyptus Longhorned Borer

Eucalyptus that were grown in California from seeds were relatively free of insect pests until the 1980’s, when the eucalyptus longhorned borer, Phoracantha semipunctata, was discovered in Orange County in 1984...

Redbay Ambrosia Beetle and Laural Wilt

In 2002, a non-native insect, the redbay ambrosia beetle, Xyleborus glabratus (Coleoptera: Scolytidae), was first detected in the United States near Port Wentworth, Georgia. The beetle was likely introduced in untreated wooden packing material, such as crates and pallets, imported through the shipment of goods from its native range in southeast Asiar....

Polyphagous Shot Hole Borer

Fusarium species is inoculated into its hosts by the beetle. The fungus attacks the vascular tissue of the tree and disrupts water and nutrient flow within the tree,  eventually causing branch dieback. The larvae of the beetles within the beetle galleria in infected trees feed on the fungus, forming a symbiotic relationship between the fungus and beetle.