Leyland cypress bare bark/browning leaves - Knowledgebase Question

Annapolis, Ma
Question by lastlook
April 16, 2009
The bark of three leylands have been ravaged and are peeled, exposing the inner trunk. Established green branches on tree are turning brown. I applied Bayer tree treatment to protect against insects last week. Is there any other way to help what has happened?

Answer from NGA
April 16, 2009


The bark of the Leyland cypress is reddish brown with a tendency to peel in long fibrous strips so what you describe may be natural or it may indicate physical injury or even insect or disease problems. Browning foliage can be environmental or caused by insects or diseases. Without more information I'm afraid I can't help you diagnose the problem. You will need to closely inspect your cypress. Look for insects or insect eggs, signs of chewing, etc. If you find some, collect them in a plastic baggie and take it to your cooperative extension office for identification. If you cannot find insect pests, look for signs of diseases - rusty or black colored blotches, etc. If you find any, cut a sample from the branch or foliage to take to the extension office. If there is nothing physical on the cypress, dig down around the roots of the plant. Healthy roots are creamy white inside; diseased roots will be rusty or brown and might have an odor. Hope this information helps you determine just what is going on with your leyland cypress.

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