In early May, we planted 36 Norway spruce trees and 26 white spruce trees around our house. They are mostly about four feet tall. The trees are from a tree farm. They were dug up when I ordered them with 28-inch root balls and planted relatively soon after digging. They grew well in May/June, having several inches of new growth. Then sometime in June, I noticed a few leaders starting to die. The leaders and new growth coming from the leaders died and turned brown. They have some sap dripping down them. Looking more closely, I see many of the dead leaders have one or two tiny holes. See the photos. The leader has this problem, but the rest of the tree looks fine. Eight of the Norways have the dead leader problem. The white spruce are fine. My guess is that this may be a white pine weevil or other similar pest. I haven't seen any pests to identify. We have many white pines on the property. They are okay. The neighbors have a few white pines with dying leaders. Questions: 1) What do you think the problem is? 2) Other than pruning and destroying the dead leaders, what else can I do? 3) I'm willing to try some insecticide to protect our tree investment. What would you recommend? 4) Should I also proactively treat the white spruce and white pines that appear fine?