Tree-killing ‘shot hole borer’ beetle discovered in San Jose

(KRON) — South Bay officials are sounding the alarm about a tiny but harmful pest wreaking havoc on trees in the area.

The “shot hole borer” beetle, roughly the size of a sesame seed, has been discovered in San Jose for the first time. While it’s unclear how or when the beetle arrived, it is suspected it may have come from Southern California, according to the County of Santa Clara Division of Agriculture.

This beetle spreads a destructive fungus that causes “Fusarium dieback,” a disease that can severely damage or kill trees. Infected trees may exhibit symptoms such as oozing sap and dying branches, and the beetles can rapidly spread the disease to other trees, according to the division.

Officials urge residents to remain vigilant and report any signs of the beetle or the disease to help manage the spread.

“We need the community’s assistance in identifying trees affected by these invasive shothole borers,” said Drew Raymond, acting agricultural commissioner for the County of Santa Clara. “While eliminating the beetle entirely may not be feasible at this stage, our goal is to contain the infestation and protect as many trees as possible.”

If you observe any signs of the beetle or disease on your property, please contact the Division of Agriculture at scc.agriculture@cep.sccgov.org or call (408) 918-4610.

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