Q.Japanese azalea
My Japanese azalea has not flowered for a few years but this year has flowered but it looks like I have mould on the branches as they have got green and white stuff covering the branches some of the branches have died and just snapped off.
This sounds like a case of Azalea Bark Scale.
Here are some links with more information and how to treat.
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-bark-scale.htm
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/pruning-azaleas.htm
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azaleas-noteworthy-shrubs-for-any-garden.htm
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-not-blooming.htm
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/pruning-azaleas.htm
