I have noticed a few things in general, however. Yellow-headed spruce sawfly. Lirula needle blight can infect white spruce (Picea glauca), including Black Hills spruce and Colorado blue spruce (Picea pungens). This is also known as leaf burn or desiccation. My tree man said he thought it was from the drought in our area. The key is whether the tree is replacing those lost needles … About 24 months after infection, Black Hills spruce needles are almost all reddish-brown and turn light tan over the course of the next few months. Unlike other needlecasts we find on spruce, the brown needles killed by Lirula can remain attached for several years. Needles on branches above snow line turn brown. There are all manner of reasons why a spruce tree's needles turn brown, from sawflies and budworms to fungi, viruses, mites and bad weather. Needles of infected trees remain attached to the tree, which is largely brown … Mainly older needles discolored 6 Fungal needle casts. New or older needles eaten 3 . Last year it started to die from the top down and now is maybe 1/3 to 1/2 dead looking.I cannot easily get to the effected area. The brown needles eventually fall off, leaving bare branches. If you notice leaf burn on your evergreen tree, the very first step you will need to take is to diagnose the problem. During the winter, the soil often gets so cold that the water in the ground freezes. Hosts include Colorado blue spruce (Picea pungens), and white spruce (Picea glauca). The disease begins on the tree's lower branches and works its way upward. Lirula needle blight is caused by the fungus Lirula macrospora. Inner needles first become discolored in late summer, turning from green to yellow and brown. Blue Spruce Tree Needles Turning Yellow, Brown, Then Dropping? Needles turn purple or brown in color and eventually fall off. When it does, the tree isn’t able to access the water and the needles begin to turn brown. New or older needles discolored 5 Spruce spider mite. This is a very common fungus that affects … White spruce, including Black hills spruce, is a more susceptible species. Many homeowners have found spruce needles turning brown and falling, leaving behind branches completely bare on trees that were completely filled-out and healthy this spring. I have a blue spruce that is about 40 years old and maybe 30 feet tall. Well, unfortunately more effects from this summer's hot, dry conditions are being seen; this time in a tree we traditionally have considered very drought tolerant- spruce. In general, the needles on a Colorado blue spruce last eight to 10 years before finally turning brown and dropping. The damage I see is, needles turn brown and fall off. S. pruce budworm. If you think your tree is infected, look for small black spots lining the needles with a magnifying glass. What does this do to spruce trees? 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