Posts Tagged: dieback
Shot hole borers are tiny insects the size of a sesame seed that don't look particularly harmful,...
[From the December 2016 issue of the UC IPM Green Bulletin] The Polyphagous shot hole borer (PSHB)...
Fig.1. Adult female Polyhagous shot hole borer (Euwallaceae sp.).
Fig.2. Dead box elder tree.
Fig.3. Beetle gallery formation on box elder.
Fig.4. Sugar volcano symptoms on avocado.
Fig.5. Staining symptoms on coast live oak.
Fig.6 Gumming symptoms on Calpurnia aurea.
Fig.7. Frass symptoms on avocado.
Fig.8. Fungal colonization on a box elder tree trunk.
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[From the August 2016 issue of the UC IPM Green Bulletin] Two “sap flux” diseases...