Ron wrote in message ...

It's also a good idea to kill off any ant's nest near the plants for
ants
are the main cause for spreading and protecting blackfly.

Regards

Urban myth again. Ants take advantage of the aphids, but I'm not sure
that blackfly even come into the types they use, by persuading them to
secrete Honeydew, but that is all, they do not spread them, or defend
them except that they will attack anything that comes near them, the
ants I mean, as they would in any other situation.

Mike
www.british-naturism.org.uk