Brassicas are notoriously hard to protect and we have all seen cabbage and broccoli leaves stripped down to a sort of skeleton as a result of pests. But netting goes a long way to solving the problem.
I have some fundamentally healthy looking broccoli (under netting) but most of the plants have a few minor holes (ranging from 0.5mm to 3mm) in the leaves. Is this a problem? Are these even pests, or just some kind of wear and tear in the leaf structure?