Blue Spruce
Rhizosphaera is the only known disease that affects the blue spruce. It is a fungus based disease that turns the needles purple in the beginning stages of the disease. A tree that has been affected with rhizoshaera can die in as little as 5 years. Die back will take place in spots either near the base or at the crown of the tree. This disease can be treated if it is caught early enough. Cankers can be a physical problem in blue spruces. Remember cankers are either human made or made by animals such as deer or bear. Most commonly trees get cankers when they are cut by weed whipper's. The only other problem that occurs in blue spruce is that there root system is very shallow and fibrous so they are very suspect to blowing down in heavy wind. Here is what to look for in Blue Spruce:- Needles turn purple in sections
- Die back in areas (especially crown)
- Needles with brown spotting in middle of needle
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