Worried about my box hedging

Having loving tended a low level box hedge I have noticed recently that it is full of white fluff which is slightly sticky on your hands but flies into the air in clouds when you brush the hedge. Is it benign of should I be treating i?. i only have a very small garden and the hedge is the major feature.

 

Give it a spray of Provado - follow the instructions.

 

I have exactly the same problem! Whatever 'bug' is causing it, it's been VERY busy!! my 4 quadrangle hedges are absolutely covered in 'white fluff' that contains grubs. WHAT IS IT?? I'm worried!

 

Could it be woolly aphid?

 

There seem to be two similar threads on possible woolly aphid infestation running simultaneously. I've not come across it before on box but I've got the same problem this year so maybe it needs serious discussion. Perhaps the threads can be amalgamated?

Chris