Boxwood blight

Asked May 13, 2020, 9:08 AM EDT

I was referred to this sight by Countryside Greenhouse. My boxwoods have been suffering since early last summer. A “deadening” started on one plant last year. I trimmed the dead and kept it pruned. By the end of the summer it was spreading. Now, it is effecting all 5 plants. I was hoping it was a simple feeding or pest issue. They recommended submitting a sample because the specific boxwood blight is incurable. Any insight or recommendations would be helpful. Thank you!

Ottawa County Michigan

1 Response

Thank you for your photos. Please look at this link and investigate what you see. It was being suggested that samples be sent to the lab for testing if you feel it is a case of Boxwood Blight. One key symptom is that blight causes defoliation from the bottom up. This is much different than symptoms from other problems that occur on boxwood. The important point is that this symptom is not enough to prove it is blight, but in these cases, it is important to have a sample sent to the lab. https://pestid.msu.edu/ Here is the link for directions if needed. I hope this helps.

https://www.canr.msu.edu/home_gardening/uploads/files/2019_msue_fact%20sheet_boxwood_blight_final.pdf

https://www.michigan.gov/mdard/0,4610,7-125-1572_3628-485223--,00.html

https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/PPWS/PPWS-49/PPWS-49-pdf.pdf