Invasive Shot Hole Borer (ISHB)

Brief Summary Information on ISHB:

Polyphagous Shot Hole Borer (PSHB) and a closely related beetle the Kuroshio Shot Hole Borer (KSHB) , Euwallacea sp. are invasive beetles that attacks dozens of common native and landscape trees. These tiny beetles tunnels into host trees and inoculates the host with Fusarium Dieback (FD), a disease know to infect over 110 tree species. FD is caused by Fusarium euwallaceae or Fusarium kuroshium, a fungus that disrupts the transport of water and nutrients in the tree, leading to branch dieback and overall decline. The larvae of the beetle within the beetle galleries feed on the fungus as their sole food source.

For more information, distribution maps and ISHB assessment tool please see the ISHB link below.

ISHB website:

California Firewood Website:

Don’t Move Firewood Website:

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