Answer: It is really difficult to diagnose a plant problem without seeing it and even more difficult without any symptoms or signs. Your pines may be diseased, have insect infestations or be suffering from drought or overly wet soils. Wish I could offer help, but without some background information, I'm at a loss. Take a sample of the problem to your local Cooperative Extension office for diagnosis, or talk to the professionals at your local nursery. Be prepared to offer a history of your tree, including your care regime, planting site, etc. Best wishes with your pines!
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