spruce tree death

Asked October 21, 2016, 7:15 PM EDT

I have many spruce trees planted in the 90's Blue, Black, and white. They are dying one or two at a time each year for the last 3 years. they will simply start turning brown until all needles are dead. I would like to find the cause.

Hennepin County Minnesota

1 Response

From what I can tell from your photos, you trees are suffering from one of two diseases, either Rhizosphaera needle cast or Lirula needle blight. Here is a link to information: http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/spruce-tree-diseases/index.html