Invasive Shothole Borers Identified In San José!
Two invasive beetles, also known as Invasive Shot-Hole Borers, have been found in San Jose. The beetles carry a fungal pathogen that poses a major threat to over 60 species in California, slowly killing the host trees. We can all do our part by identifying infected trees and containing the infestation.
Some identifying characteristics of an infected tree include:
Perfectly round entry and exit holes, about the size of the tip of a ballpoint pen.
Wet staining, bark discoloration.
Insect waste near the entry and exit holes.
Branch declines, or death and twigs die back.
If you are still unsure, click the link below to use UC ANR's tool to help determine if you have encountered ISHB.
If you suspect signs of ISHB, please contact the City of San Jose Forestry office at 408-794-1901 or email arborist@sanjoseca.gov
Do not attempt to treat, prune, or remove an infected tree without discussing with the City. A free permit from the City’s Forestry office is required if the tree needs to be pruned or removed.
