I never have a problem with aphids outdoors-always have a problem indoors and the solution is ladybugs. I have notice that some of the wild species don't seem to be as popular with the aphids.

John

I don't know. We didn't have aphids on our hot peppers much, this year. We did have them on our sweet peppers badly, though. I'm guessing applying sea minerals may help. I don't think insects like saltier plant juices. Spider mites and certain fungi don't seem to, anyway. Also, a foliar spray with calcium nitrate (it's a nitrogen fertilizer that also supplies calcium) repelled our aphids (without repelling ladybugs). Calcium nitrate may damage soil microbes, however (and it's toxic to humans).

Aphid resistant chiles is an oxymoron

You may want to try worm castings. Add it when seedlings are young. It increases the chitosan in the plants and makes the taste bitter, so the aphids leave. It wont get rid of all, but it does help.

http://thehomesteadsurvival.com/reduce-eliminate-whitefly-aphids-worm-castings/

http://buildasoil.com/blogs/news/8787365-some-really-cool-and-effective-insect-control-techniques-using-earthworm-castings

I used worm castings in 2015 when we had aphids. I applied them at transplanting time. I read that for one person, they helped with whiteflies, it seemed. They probably help some, but we still had a bad aphid (and whitefly) problem on our sweet peppers, and a whitefly problem on the hot peppers. I am, however, optimistic about sea minerals, based on the effect on spider mites and fungi.

Plants with worm castings were still heavily afflicted with spider mites, too. Granted, the tomatoes, peppers and muskmelons were fine, but the watermelons (except for the Red-seeded Citron), Garden Huckleberry, ground cherries, and tomatillos had problems.

I cant say I ever tried sea minerals, but the worm casting helped me some. Got rid of my whiteflies and some of the aphids. Then for some reason, I got a huge attraction of Lacewings and they took care of everything. Not sure where they came from since I have no flowers around. Anyway, I also tried using a spray made up of crushed tomato branches (let it sit fo a few days) and a few drops of soap. Worked great on killing aphids.