Trees Susceptible to the Polyphagous Shot Hole Borer
...ungus complex. Wood should be chipped to pieces smaller than 1″. Misguided water conservation efforts have, in my opinion, contributed to the problem by stressing our landscape trees. You should keep your trees appropriately watered. And it appears that with many of these trees, including avocados, prophylactic spraying with a pyrethroid-based pesticide every three to four months will be necessary. Dr. Turney is doing three more tree identificatio...