Answer: Unfortunately, based on your description I am not able to give you a specific diagnosis. Winter damage, drought stress, accidental herbicide exposure, de-icer salt damage, over fertilizing, insects such as spruce mites and diseases can all cause tip browing. I would suggest you consult with your local county extension for an exact diagnosis of the problem, and based on knowing that, determine how to proceed. If a chemical control is needed, they will have the most up to date information on what to use and how/when is best to use it. I'm sorry I can't be more specific for you long distance.
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