In message , jane
writes

I bought some adhesive copper tape from the Organic Garden Catalogue
and have stuck it round the potting shed window to stop them getting
in, and also around the large pot of my main hosta plant.

Sadly they don't seem to be stopped by it - keep having to remove
snails from under the pot rim daily... have to admit I was rather
disappointed. I'm just hoping that some are discouraged and I don't
have lace for hosta leaves in a month... but I'm glad I didn't buy
slug rings - much more expensive and it would have been really
annoying to find they don't work!

The two things that we have learned during the past 3 years of using
copper tape around containers of hostas are to ensure that you do not
have any slugs hiding under the container rim before applying the tape
(and check for any minute beasts already in the container at this time
of year) and
standard copper slug barrier tape works very well on slugs but not on
snails (apparently there is a serrated edge copper tape that is supposed
to work on snails and slugs but it is of course, more expensive.
Luckily we have very few snails as we have some permanently hungry
thrushes.

--
Robert