Polyphagous Shot Hole Borer and Avocados
...oles on avocado trunk. Photo credit: Eskalen Lab, UC Riverside. Of all the plants in our yard the one I care most about is our avocado tree. I’d be despondent if anything happened to it. Which is why I panicked when I first heard about the Polyphagous Shot Hole Borer (PSHB), a beetle that spreads a fungus Fusarium euwallacea. First noticed in 2003 here in Southern California, the PSHB seems to damage some trees more than others. Concerned about lo...