Yes, they do...

ladybug larvae eat even more than the adults. I also release green lacewings. They eat aphids and lots of other pests, too.

Here is a link that might be useful:

I have whiteflys really bad, and i had thought about getting
and releasing several cartons of Ladybugs.Does anyone know
how they do on Whiteflys. I have heard that spreading snail
and slug bait(the old fashioned kind, which is NOT safe for birds and pets) around the infected plants, that the whitefly larva will consume and die before they develop into mature egg laying adults. Any thoughts on this anybody?

huh - I think I have a plethera of things on my hibiscus trees. Spidermites along with aphids. White flys are in my indoor plants. It's crazy.

I put slug bait around outside last weekend hoping that would help in someway. It's the newer kind though. Thanks for the post. I'll try to find some old slug bait.

Here is a website that provide a lot of organic solutions.

Here is a link that might be useful: Arbico Organics

I'm trying praying mantids for the first time this year. The egg cases are all set and waiting to hatch. We'll see how it goes.

There is no logical or scientific reason why slug pellets would control whitefly. They do not come into contact with the soil. I suspect that that myth was borne from a mix up with fungus gnats.

Those slug pellets are higly toxic to non target organisms, by the way.