Invasive Shothole Borers

Tree of Heaven

Ailanthus altissima

 

Invasive reproductive host

Symptoms: gumming, staining

Resources: Cal-IPC, USDA Profile, US Forest Service

 

Gumming symptoms on Tree of Heaven with a knife for scale. Source: Akif Eskalen, UCANR
Gumming symptoms on Tree of Heaven with a knife for scale. Source: Akif Eskalen, UCANR