Posted 10/23/2008 17:14 (#489179 - in reply to #486796) Subject: Re: Mountain Pine Beetle threshhold?
N.C. Oregon
Look at the pitch coming out of the hole. Is there a black thing in the middle of the pitch & sawdust(frass)? If there is it is a beetle & the tree has successfully expelled the beetle.
If there are too many holes the tree will not be able to produce enough pitch to expell more beetles.
Mountain Pine Beetle threshhold?
