Feeding your mealworms

[LCReptiles]

I live in a rural area, and as such have access to a variety of seasonal vegetables. Does anyone have any information or reasons why something like a turnip could not be fed to my mealworms. Of course it would have to be watched just like any other veggie for mold etc, but I mean chemical-wise or whatever you want to call it. Have you ever heard of any veggies that could cause adverse problems for the worms or the geckos?

Thanks.