University of California Division of Agriculture – polyphagous shot hole borer beetle

In July 2014 the University of California Division of Agriculture published the following information on the borer beetle problem:

Polyphagous Shot Hole Borer – PSHB in California

Polyphagous Shot Hole Borer + Fusarium Dieback
A New Pest Complex in Southern California

Polyphagous Shot Hole Borer + Fusarium Dieback
Field Identification Guide
Signs + Symptoms on 31 host trees in Southern California