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Boxwoods dying #810135

Asked September 09, 2022, 3:04 PM EDT

My boxwoods are slowly dying. It first starts out as a small brown patch and then branch by branch the rest of the shrub dies. I have been treating them with insecticidal soap because of webs but now when I pull the dead shrub out I am finding grubs!! What more can should I be doing?

Harris County Texas

Expert Response

The plants have phytophthora which is a fungal pathogen that causes a root rot and affects the movement of water and nutrients through the plant. The attached links have management recommendations. https://www.lsuagcenter.com/profiles/bneely/articles/page<personal data hidden>19
https://www.tnstate.edu/extension/documents/Boxwood%20Phytophthora%20Factsheet.pdf

Thanks for the question.
Paul Winski Replied September 12, 2022, 2:23 PM EDT

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