Fungus in Lawwn

Hi All
Can Anyone help?
I have patches of what look like Fungus in my lawn.
They are low growing (not like toadstools or mushrooms) and are spreading across the lawn in patches.
Black and white in colour they can be removed by raking or scarifying but tend to return.
does anyone know what it is and what they can be treated with?

Regards

Jack

 

In short, nothing you can do.

There are profeshional products for use on sports turf desighned for treating fairy rings and etc but these are expensive and not easily obtainable to ameturs