PITCH MASS BORER - Synanthedon pini can be found on Austrian, Scots, and eastern white pine and white, Norway, and Colorado blue spruce. The pitch mass borer adult is a moth that appears during the summer months.  It deposits its eggs on the bark of the host pines and spruces during June and July.  Usually, the eggs are deposited near a wound, such as where a branch was removed.  The larvae bore in the inner bark and sap wood excavating tunnels and causing copious amounts of pitch (sap) to flow.  The larvae do not damage the wood very much, but the constant ooze of sap may become unsightly.  Pupation occurs in the pitch mass and this species needs 2 to 3 years to complete its development. If sap flow becomes unsightly, the borer can usually be found in the thickest pitch mass on the wound.  Dig into the sap, find the borer and destroy the pest.  There is usually only one borer in a mass of pitch and once it is removed the sap flow will slow and the wound will close.