Most wood boring beetles in this area are Lyctids (true powder post), Bostrichid (false powderpost), Anobiid (furniture/deathwatch) and Cerambycid (old house borer). They infest wood with specific moisture content and are mostly seen in wooded areas (Mill Valley, San Geronimo Valley, Lucas Valley, Guerneville, Forestville, Cazadero, and in western Marin/Sonoma). To eradicate large infestations we tarp & fumigate the structure with Vikane, Sulfuryl Fluoride and apply local treatments with Bora-Care or Tim-Bor insecticide on small and accessible infested wood members. Smaller local infestation can be treated with Bora-Care or Tim-Bor and encapsulated with a wood preservative.