Jul 09, Needles will stay on a spruce tree for years before dropping, typically from the inside of the tree and on older branches. Environmental factors can influence this cycle as well; for example, a tree that is under stress from things like drought, soil compaction or excessive moisture will enhance needle bushfalling.clubted Reading Time: 3 mins.
Jan 08, Needle Cast or Needle Blight The most common needle problem of blue spruce in Maryland is a fungal disease caused by Rhizosphaeria bushfalling.clubted Reading Time: 3 mins. Jun 28, As a result, trees affected by needlecasts often have an outer “shell” of live needles on current shoots and dead needles on older shoots (Photo 3).
The two most common needlecasts we find in spruce are caused by the fungal pathogens Rhizosphaera Estimated Reading Time: 7 mins. Spruce needle rust.
New or older needles discolored 5 Spruce spider mite. Mainly older needles discolored 6 Fungal needle casts. Scattered dead branches or twigs 7 Cytospora canker.
Needles on branches above snow line turn brown. 8 Late spring frost or winter injury Leader wilted or dead 9 White pine weevil.
Shoots and twigs swollen, needles. May 18, Rhizosphaera needle cast damage in spruce. Spruce and coniferous trees are susceptible to environmental, insect and disease problems that can cause the trees to discolor, lose needles and possibly die. Spruce in both urban and rural landscapes can be affected. Rhizosphaera Needle Cast, commonly referred to as Needle Drop, is a fungal disease that infects Colorado Blue Spruce.
White Spruce and Black Hills Spruce are a bit more resistant to the infection but can also become susceptible in the cool, wet spring or humid summer.