cypress tree - Knowledgebase Question

Name: Lori Johnson
New Orleans, Lo
Question by ljohnson0881
February 6, 2009
My cypress tree has turned yellow. What is the problem?

Answer from NGA
February 6, 2009


It is really difficult to diagnose a plant problem without seeing the plant or knowing the care and maintenance history. However, what you describe may be Cercospora Needle Blight. Here are the symptoms:

-Needles and twigs turn yellow > brown > gray
-Lower branches affected first
-Disease spreads outward and upward
-Needles drop from tree
-Tips of infected branches remain green
-Reddish-brown lesions form on 1 yr old twigs
-Olive-brown tufts of spores on blighted tissue
-Older infected trees have thin, brown foliage

If this describes your cypress, control by pruning affected branches from trees; use a fungicide to prevent the rest of the cypress from developing the disease. Apply according to label directions.

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