In article ,
Jeff Layman wrote:

Of which 7 don't work at all, to my certain knowledge.

Which 7?
All except the barrier methods and biological controls. I am
unconvinced of the last, on lifecycle grounds.

I wondered about using a combination of methods, Barrier for the main
crop. Then a few carrots several metres from the main crop and some of
those sticky yellow sheets around, maybe with some crushed carrot tops
around them just to add to the attraction. Is there any chance the CRF
would get stuck to the yellow stuff, or do you think they would be
careful enough to ignore it? Or maybe some sacrificial carrots in pots
with a wasp-trap. Could the CRF get out once they were in?

Dunno. That might work in an enclosed garden, but I doubt otherwise,
because the fly can host in many of the umbelliferae. I haven't been
able to find out how far it can fly.


Regards,
Nick Maclaren.