In article , Adrian
Jones writes
I had a terrible infestation of greenfly on my buddleia. I picked them off
and also sprayed insecticidal soap, but then I got blackfly. I sprayed and
picked again, and the greenfly returned. I sprayed again and they're back
as thick as ever. Is there no way whatsoever to control these insects?
They're doing awful damage to the new leaves on my buddleia and I'm afraid
they'll soon infest everything in sight.

You can kill them fairly easily, but you can't prevent new infestations.

And anything that kills the greenfly is likely also to kill their
predator, the ladybird larva.

I stopped using all pesticides in my garden, and over the next five
years I started seeing fewer pests as the predators began to get into
balance. I now have more birdlife than ever before, attracted by the
insects in the garden. Yes, I still have pests, including greenfly, but
not to devastating effect.




--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm