Azalea

Question

Branches look like they have mold on them.

Answer 1

This sounds very much like Azalea Bark Scale.

Neem Oil can be used to treat the plant.

Here are some articles that will help you.

https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-bark-scale.htm

https://www.gardeningknowhow.com/ornamental/shrubs/azalea/common-azalea-problems.htm

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm