blue spruce yellowing of inside braches - Knowledgebase Question

brick, Ne
Avatar for pmmar
Question by pmmar
October 26, 2010
I have a 20 + foot blue spruce. the interior braches have turned yellow all the way to the top of the tree. What could be causing this and what can be done to fix it.

Answer from NGA
October 26, 2010
There are a couple of things that could cause the yellowing. First, there's a fungal disease called needle cast. The needles usually turn yellow in July and then a reddish brown before they drop off. About the only way to tell if your tree has this disease is to look for black fungal spots on the needles. The second most common reason for the inner needles to turn yellow is a population of spidermites. These tiny insects usually leave tell-tale webbing on the needles. If you can't determine the cause of the problem from the above descriptions, take one of the branches into your local cooperative extension office for a positive diagnosis and suggested controls. Contact Rutger's University Ocean County Cooperative Extension, 1623 Whitesville Road, Toms River, NJ 08755-1199 phone 732-349-1246.

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