The Q&A Archives: cypress tree

Question: My cypress tree has turned yellow. What is the problem?

Answer: 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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