I've had the biggest problems with Asian Stink Bugs (an invasive species that is terrorizing the Midatlantic USA region) and Asparagus Beetles. Oddly enough the asparagus beetles (right pic) are mostly found on my radishes, turnips and brassica, and only occasionally on my (young) asparagus. The stink bugs (left pic) are the worst, since the birds won't even eat them.
I've been hand picking and squishing them all, and I've occasionally used neem. But I'd prefer to scare them away or confuse them with some flowers or herbs so fewer of them will show up in the first place. Any suggestions?