Spores can survive atmospheric boiling temperatures of water. Often a pressure cooker is used to sanitize substrate (wheat, and many other things) to grow mushrooms on. This ensures the only spores that exist on your substrate is the ones that you want.
Spores can survive atmospheric boiling temperatures of water. Often a pressure cooker is used to sanitize substrate (wheat, and many other things) to grow mushrooms on. This ensures the only spores that exist on your substrate is the ones that you want.