Barkingdog, Bayer is not the only maker of these pesticides though, a search on the web will provide lots of info on them. Not supporting Bayer, just saying they are not alone. Many countries have banned the use of neonicotinoids, but so far as I know US and Canada have not.
DOG - a few years ago I bought a bag of lady bugs because we had aphids in the garden. They were soooooo expensive, and while they did great eating the aphids, within days they had all moved on with the wind. They forgot to eat many aphids before they left though. I never bought more based on the cost!