Seven Ways to Get Rid of Woodworm

[Bob Culver]

Local borer certainly favour certain timbers. Rimu is a long lived local with quite dense sapwood. Borer love it.  Not native pine is much softer but not so favoured. Very long lived local kauri, very sought  for boatbuilding when it was still available, is similar pine but not severely attacked. Dunno if the parents carry a recogniton chart or taste the timber before laying eggs in exposed end grain, or the "babies" choke if in  the wrong species. I think they tap on the walls and ceiling of tunnels to determine how thick, as they tunnel parallel. Makes for patterns like o 1920s railyards when old floors are sanded.
Apparently in old clocks the borer dust clogs the mechanism!