white pine insect infestation

Question

Small worm type in tree causing limp browning. How do I save my white pines from this grub type larva from killing my 6′ newly planted trees?

Answer 1

That sounds like Pine Sawyer beetles. They are very difficult to control once symptoms are obvious. I would contact the nursery you purchased these trees from and explain your problem.
Here is an article about them and a few other borers;
https://entomology.ca.uky.edu/ef437