 I guess I kind of skipped a little bit over things like stinging nettle and poison ivy and poison oak and things like that. Are a lot of these ones we've been talking about, are they effective in these applications or are there other ones that are better? Well, because stinging nettle is very different from the poison oak and poison ivy. Very different way that they irritate you. Because stinging nettle has a lot of needles along the stems and on the undersides of larger leaves.