I found something that may work: https://www.google.com/amp/s/www.mnn.com/your-home/organic-farming-gardening/stories/amp/what-is-the-best-way-to-get-rid-of-poison-ivy
The article includes tips as well as a recipe for a liquid treatment that can be sprayed on. The article leaves out an obvious choice (one I’ve had experience with) -a goat! Anyway, I hope this helps!
Here's a bunch of ways:
This is a helpful article https://www.gardenista.com/posts/landscaping-101-how-to-get-rid-of-poison-ivy/
This is a great article https://www.howtoremoveblackmold.com/how-to-kill-black-mold/