wax myrtle – problem

Question

12′ shrub dying. Leaves turning brown and falling off. 6 yrs. old and irrigated.   Two other wax myrtles planted same time in close proximity and look healthy. Have been told it has possible borers.

Answer 1

There are many things that could be wrong with it. Borers are a possibility. This article may be helpful in determining if it is borers:
https://extension.colostate.edu/pubs/insect/05530.html

This article will name some other diseases or pests that might be affecting it:
http://www.ipm.ucdavis.edu/PMG/GARDEN/PLANTS/waxmyrtle.html

In general, if you are unable to pinpoint what is wrong, I would recommend treating the plant with neem oil. It is both a fungicide and a pesticide and will treat many issues that could possibly be wrong.