On Sat, 7 Aug 2004 22:22:39 +0100, "Sam" wrote:

Our brassicas are being shredded by thousands of caterpillars what would be
the best, preferably natural, control to use?


Enviromesh/fleece.
Of course, before you enclose the crops you'll need to ensure there
are no remaining caterpillars or eggs.

It's worth spending a bit of time to knock up a frame of some sort, as
you'll need to lift the fleece to tend the crops and pick the slugs
off.

Regards,



--
Stephen Howard - Woodwind repairs & period restorations
http://www.shwoodwind.co.uk
Emails to: showard{who is at}shwoodwind{dot}co{dot}uk