Azalea Plants
Q.

What is the black mildew look on the back of established azaleas

Zone De Queen, Arkansas | Shirley Pearce added on April 28, 2014 | Answered

The plants have been beautiful during the flowering season. Still had blooms but were fading. Did not notice that the leaves were turning whitish until today.

A.
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theficuswrangler
Answered on April 29, 2014

It sounds like you might have scale on your plants. This article tells more about them and their control: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm Whatever control you use, make sure to apply it once a week for 4 weeks to break the life cycle of the bugs.
Also, here's an article on other possible problems that might affect azalea: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/common-azalea-problems.htm

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