JJ wrote:
It needs to be like -30 for 3 weeks to do much good.
I read that they have pinebeetle in the National Forest in Montana. So if the pinebeetle has gone South there is no way of killing it off because they will never get the -30 of 3 weeks so it will just come back up North again.
I saw it this summer just east of Missoula, the beetle was stopped by the interstate at the time. One side was dead the other was green.