Blackfly

[MelanieSW]

I wonder if killing the ants in the area would help.

David

Not having any ant nests nearby should certainly help. For next year I am looking at nematodes against ants (they only deter and won't kill the ants, so that they set up home somewhere else).
Nemasys sell those, and I intend to treat the whole allotment with it!
I always have quite a few ant nests and usually just leave them be, but this year the blackfly were just too much.