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Oak Trees


Zone 77494 | reggieut@aol.com added on November 13, 2020 | Answered

I have recently noticed some disease on the leaves of my oak tree. It makes the leaves turn yellow with orange bubbles on the surface. I also have Mealy Bugs on this tree. Are the 2 problems related? I’m going to use an insecticide for the Mealy Bugs (Malathion), but don’t know what to do with the other problem. Are you able to provide guidance on these issues? BTW, what type of oak tree do I have – Live Oak? Thanks ! Reggie

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Certified GKH Gardening Expert
Answered on November 13, 2020

It does appear to be a Live Oak! The mealy bugs can cause many diseases, and the blistering is likely related to that.

You will need to correct for the mealy bug problem, first. This article will help:


Next, you will need to treat with a fungicide to combat the disease left behind:


This article will help you to care for the tree:


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