aphids on beech hedge

Questionsaphids on beech hedge
Stasia Rooney Staff asked 11 years ago

We have a beech hedge in front and back garden, it is covered in something like greenfly. At the moment cannot even trying cutting it, as there are millions of these flys on it. What would you suggest, we have tried spraying with suddy water, and spray to kill greenfly cannot remember the name of the spray, but because there are so many, nothing seems to work.