Αποτελέσματα Αναζήτησης
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.
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.
Within the last few weeks the Purdue Plant and Pest Diagnostic Laboratory has been receiving samples of pine and fir trees with needles turning brown from the tip back and severely affected needles falling off the tree.
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).
21 Νοε 2023 · 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 the new, current year's needles appear healthy. The dark fruiting structures sometimes appear to have fuzzy tops. Stigmina lautii: Space trees and provide good ...
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.
