Is it harmful? What should I do about it?
It was undoubtedly caused by the excess water on the surface from the drippers. Those are now off.
Is it harmful? What should I do about it?
It was undoubtedly caused by the excess water on the surface from the drippers. Those are now off.
Not a problem, will go away as the soil dries out.
The fungus is having a meal of the woody organic matter in the soil.
No action is required on your part.