Please help my azaleas

My azaleas have just finished treating us to a great display of colour in the border. However, I have noticed that on a few of the leaves there is a strange yellow waxy cocoon developed. Can anybody tell me what this is and how I can treat it. I am worried in case it is a disease that can spread to the other plants in the border.

Salgor

 

Only thing I can think of that's waxy is a mealy bug....... Best way to eradicate is to pick of leaves .. Burn don't compost

Then feed the plant with something like sequestered iron..................

 

Thanks Doug but what is sequestered iron.

 

Hi

Sequestered iron is a food /tonic for ericaceous plants ie azalea rhododendron camellia etc .... Sequestered iron is more like a lucozade for us ... A pick me up ......

 

If you could post pics it would be useful.

I use Vitax Seaweed with Sequestered Iron (liquid feed) Maxicrop do one as well.

 

Thanks Doug.
Merleworld, sorry I raced outside to follow Doug's advice and took the leaves off so they are now in the rubbish bin (not compost bin) so no photos.