Tag Archives: Rhizosphaera kalkhoffii.

Rhizosphaera Needle Cast on Spruce Trees

I’m hoping that someone in your group could give us some advice. Our blue spruce trees (7-8 years old in zone 5 just north of Toronto) have been affected by Rhizosphera (black spots on needles detected with a loupe). We…

Help with Serbian Spruce

I have a mature Serbian spruce which seems “dead” . It was alright till Aug 2017 and in Sep I noticed the lower branches shedding needles and by fall, the entire tree.This spring, no growth and seems gone. I have…