Pyrethrin is naturally occurring in daisies and chrysanthemums. I’ve been reading up on natural plants that are insect repellent due to my mother developing an interest. You’d be surprised. Plant basil in between your tomatoes, they don’t just taste good together.
I believe Tyrethrin is the “natural” version of Permathrin.
The thing I love about permathrin is that it is not a repellent. Rather, it is a KILLER. So, if a tick or chigger gets on my clothing and somehow makes it to my skin, it doesn’t matter. It will be pining for the fjords soon. :)