Posted: 07/03/2013 at 12:19
I do hate slugs too, especially as I grow arge numbers of hostas, but I could no more chop them in half than fly! I have found copper collars on pots helpful, some of the dry granular things help a bit, but grease on pots just doesn't do it - there is a wild life friendly slug pellet that works and doesn't seem to harm anything else.
Nematodea do work, are very expensive and such hard work to use, besides which, once your patch is clear, all the neighbours slugs move in so it doesn't last long as nature abhors a vaccuum! I have been known to use them on a small area of ground I wanted clear for a while for a special reason, not tried them in my many pots yet, might consider that as the work in dilution and washing in may be slightly less - not at all sure about it though.