Spruce Tree Branches Needles 2780 X 2780. Those with sharp eyesight will also notice that spruce needles are attached to a branch by a tiny peg (pulvinus), while fir needles are attached directly to the stem with what appears to be some sort of suction cup. How to Care for a Diseased Blue Spruce Tree.
Another important distinguishing feature is that spruce needles are attached to small, peg-like wooden structures.
Blue spruce trees are also susceptible to Rhizosphaera needle cast, caused by the fungus Rhizosphaera.
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With their magnificent appearance, Spruce trees look outstanding! The disease begins on the tree's lower branches and works its way upward. These conifers feature needles attached to the branch by a swollen area called a pulvinus—a joint-like.
