Cytospora spp., Sphaeropsi sapineas, Siroccus conigenus are the only cankers found on spruce at this time. Of the three, Cytospora spp. is the one that does the vast majority of the killing It is the READ MORE http://urbanext.illinois.edu/focus/cytosporacanker.cfm
Stephen Nameth
C. Wayne Ellett
Jim Chatfield
The most important disease of spruce in landscape plantings in Ohio is Cytospora canker. This disease is caused by a fungus and is frequently found o READ MORE http://ohioline.osu.edu/hyg-fact/3000/3033.html