Thread: Wood Boorer in Doos Jamb

Good evening,
I completed building our house in 2007, l used a 15 year old external Door Jamb and Door (in excellent condition) for a West Facing Laundry Entry. Today l found fine powder at the base of the door, upon examination of the Jamb l have found 20 (what l persume to be) Boorer holes. From, my reading of some of the forums l believe l have 2 options , either treat with commerical preps (Rentokil or Bayer products) and hope these work or remove and replace the Jamb with new. I am having difficulty to understand the possible existence of the Boorer in 15 year old wood .The wood species is Meranti. Could some one please provide advice on the best of these options. The House is 5 years old , predominately Weatherboard , F10 Structure on concrete joists approx 20 - 60 centimetres off the ground sloping sth ward. Is it possible for these buggers to spread to the WA Karri Floorboards (l laid 150 sq/mts of them) they are glued/blind nailed to Yellow Tongue particle board and l would like to understand the probability of this occurring in light of my tretament options.
Thank you.
Steve3073