help! pine beatles?
We just moved to our new house one year ago in North California. Beginning this autumn, I start to find white sand piles, and holes(please see attatched picture) at foot of our pine trees within 3 months, they appear from one tree to all three of them. All I can remember about the changes are, we bought some logs for gardening decoration, and we did a tree trimming. Now, I am most afraid if they are pine beatles, which I hear cannot kill, and if so, what's the best to do, also, if not, what could it be and what's best treatment. Thanks a lot!