Rhizosphaera Needle Cast
Video
In this video we follow Ed Zaworski as he shows us how to diagnose some tree problems.
Several samples have come into the Plant Disease Clinic lately, showing symptoms and signs typical of Rhizosphaera needle cast. This disease is caused by the fungus Rhizosphaera kalkhoffii and is most common on Blue spruce; however, Black Hills spruce is also susceptible.