https://marketmillion.com/what-are-biological-fungicides-and-how-does-it-work/
What are #Biological fungicides and how does it work
You must know when to use bio fungicides. For protecting the plant, you need to use bio fungicides in the garden before any disease develops as bio fungicides will not cure an already infected plant. Make sure to apply it at an early stage to protect the root against attacking fungi and encourage vigorous development of root hairs.