Crape Myrtle Trees
Q.

Disease on Crepe myrtles

Zone 7 I think | dkiser628 added on April 13, 2012 | Answered

There are white spots on the underside of the trunks of my crepe myrtles. What kind of disease is this and what should I do about it?

A.
A.Answers to this queston: Add Answer
Nikki
Certified GKH Gardening Expert
Answered on April 14, 2012

It sounds like the tree has scale. This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm

I would recommend neem oil. It is both a pesticide and a fungicide, so it will kill the scale and any fungal issues at the same time. It is also organic ans safe to use. Here is more information on it: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

If the spots are more greenish or grayish white and flaky, it is lichen. It is harmless to the tree. This article will explain more: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm

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