I've been away for 2 weeks and returned to find that something has been munching on my brassica leaves, luckily the still seem to be doing ok. Before I went away I covered the area in coffee grounds in the hope of deterring any slugs.
What I'd like to know is, if it's slug damage should there be visible slime trails on the leaves? I can't see any actual creatures on the leaves, or slime trails, only cabbage whitefly underneath, and the odd cabbage white egg that I've removed.
thanks
Sweet-pea