
Invasive Shot Hole Borer in the Bay Area: Signs, Risks, and Treatment Timing
Invasive Shot Hole Borer (ISHB) has quickly become one of the most concerning tree pests affecting the South Bay and Central Peninsula. Since being identified in San Jose, arborists throughout the region have been closely monitoring high-value trees for signs of infestation and decline. What makes ISHB especially problematic is how aggressively it attacks already stressed trees. Many mature sycamores,




