Holly Bushes

Nellie Stevens Holly

Anonymous added on December 6, 2014 | Answered

20 year old Nellie Stevens holly tree has square holes eaten into bark around circumference of trunk has several identical rows - ten feet off ground and 15 feet off ground with sap leaking from these areas.

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Certified GKH Gardening Expert
Answered on December 8, 2014

I suspect that you are looking at either carpenter bee damage or borer damage. A common borer that attacks holly is the Redheaded Ash Borer. These articles will help you determine which it might be: http://www.ento.okstate.edu/ddd/insects/redheadedashborer.htm


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