"John Vanini" wrote in message
...

....

As Mary suggested, it just might stop slugs but then they may be able to
climb a 4" plastic wall - I really don't know.

No, I didn't suggest that it might stop slugs, slugs are my greatest problem
with brassica and I wondered if this method might work some magic with them
too :-)

A 4" vertical plastic wall wouldn't be a barrier to any slug, I've seen them
on the first story wall of our house and they're often found on the garage
roof and the greenhouse roof too, both inside and out.

Mary