Japanese Acer

[nomadandy]

Hi can anyone help,
have a large Japanese acer(mapel leaf red) some of the leaves have a silvery residue on the top, and have found what looks like black fly under some of the leaves, please can anyone advise what causing this and correct treatment to cure.

[carlton23]

Residue is the aphids droppings, which can be removed with a spray of a few drops of washing up liquid in water and it should rid the plant of Black Fly also. Best to use one of those large pump-up bottles for a powerful jet.