Pine Bark Beetle infestation
About a month ago, we had a large pine tree that died very quickly at the lake (Outing MN, Cass County). We didn't know why. Took the tree down immediately and hauled it away. Now the one next to it is nearly dead. I figured out its pine bark beetles by googling the sound the tree was making, and listening to recordings, then finding information and videos. I just want to confirm... when is the best time to take down this tree to try to prevent the beetles from moving on to the next tree? Is it better to take down the infested tree right now or wait until late fall or early spring? And secondly, if the next tree (the 3rd one) already has beetles, is there any treatment we can do to save the tree? They are all really large pine trees and appeared to be healthy. Not sure why this is happening.