I wouldn't think so Bro. I know I have a lot of earth worms in my yard and I use lawn ferts a couple times a yr.Will hitting my vegetable garden with MG from time to time kill off the worms? I hit my garden earlier this week with some MG(foliar/drench) They seemed to enjoy it. I would think an occasional dosing would be diluted by the rain and regular waterings. I know the soil is pretty well populated with worms at this point. I see a bunch of them in every hole I dug to plant my seedlings.
I'm talking about growing in pots where you fertilize a lot.