Ernie,
Wooly aphid is a sod.
Sorry but I think that there are no systemic insecticides available for
fruit available to the amateur grower any more.
They say you can use strong jests of water but the only effective
treatment I can offer is a paintbrush and some methylated spirits. Dip
the brish in the sirit and just scrub the infestation. This is how I do
it and if you are thorough it does last most of the season.
Due to their wooly coats, they are though things for contact sprays,
need a thorough wetting.
Commercially a nicotine spray is used. I do not know of an amateur
spray that is approved.
Sorry
Clifford
Bawtry, Doncaster, South Yorkshire