Does anybody know the cure for bay leaf curl?

i have a problem with the leaves on my bay tree and i think it is a disease called bay leaf curl does anyone have the cure or know how i can control it?

 

What does it look like? Do the leaves drop at some stage? do they go brown? Is there any sign of insects ie. black sooty mould.
Who said it was 'Bay Leaf Curl' and that said, didn't they say how to control it.

 

I can't see anything on Bay Leaf Curl

there are some diseases here
http://www.ipm.uiuc.edu/diseases/series600/rpd601/

I would think either an aphid of some type attacking the young leaves or a fungal disease?