Summary
A beetle that kills Coast Live Oaks within three to five years may have reached Thousand Oaks — rangers found telltale D-shaped exit holes in a downed tree, and the city has removed four suspect trees. Cal Fire will inspect on February 24, and agencies are coordinating monitoring and treatment.
At a glance
- Total mentions
- 3
- Last 30 days
- 0
Last discussed Aug 24, 2026.
Impact analysis
Unknown; treatment may include tree removal or insecticide application.
Coordinated early detection could slow the beetle's spread and save oak trees across the community.
Owners of Coast Live Oaks could lose trees; the beetle is nearly always fatal to infested trees.
Mentions & discussions (2)
Planning Commission Regular Meeting - Aug 24, 2026
A resident raised concerns about a centuries-old protected oak tree, tagged #1, on land near a property recently offered for sale in the North Ranch area. He warned that removing such trees could undermine the arroyo walls that support nearby homes worth over a billion dollars collectively.
COSCA Board Meeting - Feb 18, 2026
A beetle that kills Coast Live Oaks within three to five years may have reached Thousand Oaks — rangers found telltale D-shaped exit holes in a downed tree, and the city has removed four suspect trees. Cal Fire will inspect on February 24, and agencies are coordinating monitoring and treatment.
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