Yeah I did a good amount of reading about the ingredients, effects, etc. The bayer is in fact a systemic, the reading I did (and the label, go figure) recommended at least 21 days prior to harvest before last use on crops. And believe me, I'd prefer not to put this shit in my plants at all, but I used it at recommended doses for a couple days, over the recommended timeframe before harvest, so while I'm sure its not the best thing to do taste/health wise, I'd rather have a slightly harsher smoke than no smoke at all. And FWIW, the patients this goes to were all informed of my decision to use it and given a say, none wanted me to lose the crop.
Now that the bugs are under control (fingers crossed) I use the systemic outside on my ornamental trees and am only spraying rosemary oil, pyrethrins, and azamax LIGHTLY on the surface of my hydroton.