Carpenterworm (Prionoxystus robiniae) infestations can severely affect oak trees. They typically only attack trees that are already stressed, so good cultural management practices are the best way to avoid infestations. Carpenterworms can be identified by the abundant frass and tunnel entrances at the base of the tree.  Below are some pictures from a recent encounter with Carpenterworms on a client's heritage oak tree.

Join Merlin this fall at Santa Rosa Junior College for the Introduction to Arboriculture class! This class is ideal for anyone interested in becoming an ISA Certified Arborist or working in the landscaping industry to learn more about proper tree care. 

Classes meet Wednesday evenings at 6pm. See the SRJC catalog to learn more and enroll:

Course topics include: Principles of urban forestry, arboriculture careers, and tree care; including tree biology, tree identification, plant health care, soils, nutrition, planting, worker safety, climbing, pruning, tree risk assessment, tree care tools and equipment. This course provides the knowledge necessary to be successful in the tree care profession.  This course also prepares students for the International Society of Arboriculture's (ISA) Arborist Certification examination. 

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