Pythium Resistance From Vermicompost
Vermicompost (“Worm Castings”) has been proven to have an effect on the plant parasite “Pythium”.
Technically, Pythium is a genus of parasitic oomycotes.
The plants roots basically rot. The plant will then die.
Studies discussing Pythium resistance in plants where the soil or potting media has been treated with, or has an inclusion of, Vermicompost:
A simple Google search using the terms “pythium vermicompost” will show up TONS of info on the subject.