I've found my hero today. A news release in EurekaAlert! tells the story of John Jelesko, a Virginia Tech College of Agriculture and Life Sciences researcher, who has isolated a naturally occurring fungus that kills seeds and seedlings of poison ivy.
I hate poison ivy almost as much as it hates me. It seems endemic to this part of the country, and I don't even know how I manage to get most of my cases. Suspect the cats.
In reading the article, I surmise that this Colletotrichum fioriniae fungus does not kill mature plants. More's the pity. This is one life form that I would not feel the least remorse in seeing it become extinct.
A SYTL for today's title: https://www.youtube.com/watch?v=N13fzKlzSw4