Black fly Cherry tree

[Leachy10]

I've got black fly on a new cherry tree. Can any one help?

[Lonnie]

You can spray with soapy water, that'll clear them, but that would also kill the bugs that eat them, Ladybirds, Lacewings etc,

You can introduce those friendly ones, and you wouldn't regret it, but having said that, if your tree is healthy, it won't come to much harm, the Blackfly are after the sugary sap in the new shoots, and a healthy tree will heal itself.

[Leachy10]

I am trying the soapy water and I'm looking for ladybirds but I think they are all on holiday