1 hour ago, CosbyArt said:
Well fruit flies are the easy ones, any other species requires meat and really make a stink (one reason many don't culture them).
Depending on your weather (temperatures) you can do a
outside culture setup like this one from member
Jay.
Inside you can do a similar setup, a food mix of dry dog food, dog biscuits, or milk. The larvae/maggots will eat and produce heat, and a awful smell themselves (not counting what you fed them). The adult flies have to be coaxed into laying eggs, in laboratory settings is done with a piece of chicken liver, or any type of meat (the more decomposed the better). I have some links saved if you would like to see them, I'll dig them out and post them later.
I've tried raising them inside on dog biscuits and culture mix (in 32oz containers like fruit flies) without much success. The larvae/maggots can quickly dry out, or have issues pupating, both of which was the end of my attempts. While I did manage to keep the odor down to a reasonable level, that my wife didn't know what I was doing, they didn't do so well - likely the increased moisture and meats would have solved the issues I had but at the expense of odor.
I'd recommend you take a look at the Forked Tree Ranch episode on Dirty Jobs with Mike Rowe, as it shows the largest supplier of fly pupae/maggots in the USA. It gives a look at how to keep the flies, feed them, and more - perhaps you can come up with a workable solution for yourself.