Polyphagous Shot Hole Borer (PSHB)

New insect-disease complex strikes Southland trees!

UC Riverside scientists have identified a new insect-disease complex that is threatening avocado, coast live oak, box elder and other trees in Southern California. The complex includes a new shot hole borer and a symbiotic Fusarium species, which causes branch dieback. The same beetle and fungus have also been found in Israel, where the complex has caused severe damage to avocado trees since 2009.

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