Slugs and snails
I feel your pain. I tried everything last year to stop the little fuckers decimating my rhubarb and eventually resorted to home-made beer traps. Trouble was, the wet weather kept flushing them out.

This year, I've hit upon an innovative solution. A friend gave me a crate of Gillian McKeith hemp seeds that were short dated and cheap. I couldn't bring myself to eat hemp seeds (after all, veggies need to avoid such hippy things as a matter of personal pride and they had NotDr's gurning face on them), so I decided to use them as mulch. Bingo! No sign of slimy nibbles so far.
(IHateSprouts is baking a huge pie shaped like an enormous pie, Thu 6 May 2010, 9:47, Reply)