Host Species

Reproductive hosts are tree species that are capable of 1) supporting beetle reproduction and 2) growing the fungi that cause Fusarium Dieback. The species below have been confirmed by UC Cooperative Extension Plant Pathologist Dr. Akif Eskalen. As research continues, these lists may change. Check back for the most recent updates.

Source: Eskalen, A. (January 2018). Eskalen Lab: Fusarium Dieback/PSHB and KSHB [List]. Retrieved from http://eskalenlab.ucr.edu/pshb.html

Canker associated trees are those that only become reproductive hosts when they are previously infested with canker. When trees are healthy, the beetles cannot successfully reproduce in them. However, if the tree has a canker infested branch, the beetles can successfully colonize the tissue next to the canker. If you have tree species that are listed as "canker associated," you should monitor them and check for cankered branches. Prompt removal of these branches may help to avoid getting them infested with ISHB.

Source: Eskalen, A. & Nabua-Berhman, B. (July 2018) Personal communication.

* Indicates species native to California

** Indicates canker associated