In article ,
Peter Robinson wrote:
Nick Maclaren wrote:

In article , No. 6 wrote:

http://www.gardenersworld.com/plants...ways-to-avoid-
carrot-root-fly/

but they don't include my favourite method

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.


Regards,
Nick Maclaren.