Not that I am aware of. This is Earth Worms right? Earth Worms only feed on dead and rotting matter such as leaf litter or vegetable peelings (in the compost heap). I suppose they could feed on bulbs but only if they were already dead or rotting. I have found worm-like maggots feeding on rotten bulbs in the past. Luke
All sorts of stuff will eat bulbs, but earthworms don't have teeth, they might go for the composting stuff around the outside of a bulb, but that would be it.