Belknap Landscaping came out to the island yesterday to assess our 6 red pines and concluded they are not salvageable. There is not enough active growth to pull the insecticide up the tree to kill the insects. The diagnosis was disappointing but not surprising as the trees have rapidly declined over the summer. The trees are right along the shoreline and have provided valuable shade as we have western exposure. Their certified arborist, Peter, is very knowledgeable and helpful. If you have red pines that have been impacted by this invasive insect but still have a decent amount of healthy branches, I strongly recommend calling Belknap.
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