We have several blue spruce trees in our yard and one is dying, dropping green needles, and turning brown. I don't want it to spread to the others. The trees are about 20 to 25 years old and have always been beautiful. If there is a known problem this year, perhaps you could recommend a spray.

There are several pests that can cause needle browning and defoliation of blue spruce at this time of year. Spider mites and needlecast, a fungus disease, are two of the most common. Both pests are treatable, but neither are normally associated with death of the plant. I recommend contacting a certified arborist to evaluate the trees to determine the cause of the problem.

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