Challenges:
Invasive Non-Native Insects
(C) Richard Murphy
Learn more about this destructive species through these studies done at UC Riverside, Center for Invasive Species Research
What is killing our native trees?
You may have read there are beetles that are decimating our native oaks and other native trees and making our landscapes more at risk of fire. Like the discussion of non-native invasive plants, insects can be extremely damaging when there are no predators to keep them in check. The Goldspotted Oak Borer (GSOB) is an invasive beetle that is killing thousands of trees in southern California, including trees on Conservancy preserves.
Conservancy land managers are actively addressing the infestation, using best available science, treating damaged trees are funding allows. At times, you may see no entry signs on the Keithley Preserve in Elfin Forest, when treatments are underway. Please respect the signs, for your safety and the safety of our team members doing the treatments.
GSOB was believed to have come to southern California from its native range in Arizona, carried here in firewood by someone unknowingly. You can help protect our native landscapes from being further decimated by never moving firewood.
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Sadly, GSOB is not our only current insect foe. Non-native invasive shot hole borers are at work throughout San Diego County and southern California, decimating native habitats. The Conservancy has been participating in research through UC Riverside to help scientists gain a better understanding of shot hole borer behavior, in hopes that a predator can be found to keep it in check.
