Aphids this year showed up as wingless singles, for a period of about ten days, one at a time, and as I am paying full close and gentle attention to my plants this year (all 6, here in Colorado-potted in 3.5 gallons), I discovered when I simply removed them and put them elsewhere, carefully, after about ten days, no more were found, and they did not proliferate; I have none, nada, all season. I do have to shoo grasshoppers from time to time; if they are just sunning, I watch them and let them be for a while. I let them have a snack if they are eating, and then shoo them. I have discovered various insects on my plants, from time to time, and I leave them alone; katydid, various beetles, etc. (As warned by Buzzer here, beware aphid farming ants. Other ants will keep your plants free of many other insects). I would draw the line if I saw any signs of any beast proliferating; not a worry, hasn't happened, no problem). (And, I believe you meant to say "upwind"...peace)
P.s. Anything that kills insects is not a good idea to ingest; certainly combusting such a chemical/s is not a good idea- there are gut parasites that are more natural; I have concerns as cane toads were loosed to eat can beetles, and mongoose were released to kill rats, as I recall-oops. I trust you and yours are well and happy; good luck with all...peace