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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.
Normally, a small proportion of spruce tree needles, on the most inner parts of branches, go brown and shed each autumn. Excessive or sudden inner needle drop is a sign of fungal disease, while needle loss at branch tips indicates tree stress from lack of water, winter injury or transplant shock.
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.
Pegs obvious where needles have dropped off. Spruce identification. Needles are short, stiff, and sharp. They are attached singly to twigs on a woody, peg-like stalk that is easily seen where needles have fallen off (bottom image).
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 · Norway spruce is relatively resistant. Stigmina needle blight: Year-old needles turn yellow, then brown, and then fall in the Spring a year after infection. Brown needles have tiny, black fungal fruiting structures in rows on either side of the midvein on the underside of the needle. Large bare areas develop on the tree as needles fall while ...
29 Νοε 2022 · There are a few things you should look out for when your spruce tree is losing its needles. If the needle loss is severe, if it’s accompanied by other symptoms such as twig dieback or red needles, or if the tree is generally unhealthy, then you should contact a professional arborist.
