I work in Ag, which is probably a bit rare around here, and I also happen to be a pesticide applicator. Granted, greenhouse industry, not much field farming, but this is an issue that affects us too, if only for PR reasons.
This exact scenario was explained to me about a year ago from an entomologist from MSU working in their Ag extension. Dr. Smitely is his name if anybody wants to double-check my memory or look into what else the guy has to say about neonics and bees.
His take on this issue was pretty simple: it's a cultural fix. Teach the field farmers to quit emptying the "dust" of their seed bin at the edge of the field. Do it in the middle and we're good. That's it. That fixes it. That keeps the insecticides away from the wildflowers that they're going to gravitate to.
There was a bit more to the talk, so I'll just go ahead and cover some of that too.
The rise of neonics is tied to the rise of GMO pretty directly. We've had neonics for a good while, like the mid 80's, but they didn't get much use for field farming as a seed treatment until GMOs. When the seed costs rose it then became more economical to treat the seeds rather than just seed at a higher rate. Incidentally Australia tracks right along with the US in the rise of neonics and GMO crops but they have not experienced CCD or any decline in bee populations. They also don't have the varroa mite in Australia, which is why some think it's the mite and then something else on top of it leading to CCD with neonics being a possible candidate.
Related to the GMO thing is with the RoundUp Ready GMO crops fewer wildflowers exist for the bees. Being able to dose the field with RoundUp before planting and then again after the crop has sprung up reduced the bees forage areas. Now you couple that with dumping insecticidal dust remaining in your seed bin on the few remaining wildflowers at the edge of a field and you've got some bee deaths. In hindsight we can see the problem but nobody really saw it moving into today's world.
The last thing I'd like to mention is pretty much every insecticide is bad news for bees. Neonics are actually on the safer side of things for bees. That's not something you generally hear about because it's not popular and it's hard to make a meme graphic to spread across Facebook that reminds people that organophosphates, carbamates, pyretheroids, avermectins, etc. all suck for bees... and sometimes humans. Big words are hard. Thankfully this is Slashdot!