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8 Φεβ 2023 · If it’s turning red, your spruce tree may be ill, have damage that you haven’t yet noticed, suffer from a pest infestation, or it could even be lacking essential nutrients that it uses to keep its needles healthy and green.
26 Απρ 2024 · One of the most prevalent diseases that affect Norway spruce trees is needle cast. This fungal disease causes the needles to turn yellow or brown and eventually fall off, leading to sparse foliage and reduced growth.
Norway spruce is relatively resistant. During late summer, this disease causes first-year needles to appear mottled or speckled with dull yellow or reddish blotches. Later, (often the next year) infected needles on the interior of a branch turn purplish-brown (from the tips downward) and drop prematurely.
21 Νοε 2023 · Prune infected branches. Blue, white, red, black, Engelmann, and Norway spruces are all susceptible to this disease. Needle rust: Year-old needles are cast after turning rust-colored in the spring. Blue spruce is very susceptible, as are black, Engelmann, red, Sitka, and white spruces. Chrysomyxa weirii: Destroy heavily infected trees.
22 Νοε 2019 · Diseases. Norway spruce is susceptible to a variety of diseases, but the two main ones are cytospora canker disease and Rhizosphaera needle cast. Both diseases occur because of fungus growth on the trees, but each has different symptoms. When you think your spruce trees have a disease, try to identify it.
Our Solution. The solution is quite logical when you know the cause of the problem. Most of the time, it is due to overwater of the Picea abies. We advise you to remove the infected parts of the plant, cut off the infected roots and leaves, then repot your plant using sterile potting soil and a clean pot. Why does my Norway Spruce have leaf spots?
By autumn all needles on affected branches have dropped off except the needles on the tips of the branches. Affected branches may be scattered throughout the tree or include the entire tree. Tiny, black pimplelike fruiting bodies are on the twigs, not on the needles (bottom image).
