My green bean leaves are starting to get some spotting and "trails" in them - can someone tell me what this could be (and also hopefully how to treat the leaves)? It's the large leaf at the top left in this photo, hopefully it's clear enough.
Along the same lines, I would love tips on how to catch pests in the act. Something is eating my spinach leaves (plants are only about 4 weeks old so there's not much to the leaf yet as it is!) and I've tried checking them at various times of day but still can't see what it might be.
Thanks in advance for any assistance!