Oak decline disease is not just limited to one particular species and has been observed in numerous different trees with the most severe outbreaks noted in red, pin, scarlet, white, and black oaks.

Agriculture officials in Marin County are alerting property owners and arborists to be on the lookout for a tiny invasive beetle that attacks oak trees, after the insect was detected last month in ...

Native to Europe, the Middle East, and North Africa, the beetle was identified in a valley oak in Novato on May 23, 2025. The insect was first detected in Napa County in 2019 and has since been ...