Invasive Shothole Borer Detected in Santa Cruz – Here’s What to Look For

Invasive Shothole Borer Detected in Santa Cruz - Here's What to Look ForPost Date:09/22/2025 FOR IMMEDIATE RELEASE September 22, 2025 Invasive Beetle Detected in Santa Cruz Public Asked to Help Spot and Prevent Spread Santa Cruz, CA - The Santa Cruz County Department of Agriculture, in partnership with the University of California Cooperative Extension, has confirmed the presence of the invasive shothole borer beetle in trees located in the Tannery area of the City of Santa Cruz. Arborists identified two affected trees, prompting local agencies to call on the public's help in early detection and prevention of further spread. Invasive shothole borers (ISHB) are tiny beetles that can seriously damage or kill many types of host trees. In Paradise Park, just upriver from the Tannery, one heavily infested tree has been found with hundreds of entry holes-clear evidence that more beetles are present and spreading. Local officials want residents to be aware and vigilant in spotting early signs. What to Look For: Small, perfectly round entry holes (about the size of a ballpoint pen tip) Wet staining, gumming, frass (boring dust), or sugary buildup around holes How to Help: Take the ISHB Detection Assessment to check if your tree shows symptoms Report suspected infestations to: Santa Cruz County Agricultural Commissioner's Office: (831) 763-8080 UC Cooperative Extension, Santa Cruz Mountains Forests Program: [email protected] By staying alert and reporting signs early, residents can play a vital role in protecting local trees and preventing further spread of this destructive pest. Return to full list >>