• By Sherby Sanborn

Oak Pit Scale, a New Pest?

Oak pit scale is a non-native oak pest introduced into the United States from Europe, now well established throughout California. As a Consulting Arborist, I have observed populations of this pest to be increasing in many parts of Sonoma County, particularly Sonoma Valley...

Continue Reading »


  • By Sherby Sanborn

Oak Leaf Anthracnose

Many trees, both native and ornamental can be affected by anthracnose disease. These fungal diseases cause premature browning, shriveling, and leaf drop. For some trees, such as Modesto ash and sycamore, and Chinese elm, this can be an almost annual event often causing complete defoliation. For other species of trees, including native oaks, the affects are dependent on spring weather and / or, the local microclimate....

Continue Reading »