There are many fungicides available in garden shops and greenhouse centers. Small applications will help control mushroom growth in your lawn. Large outbreaks will require digging up the source.
There would be two ways to do this, possibly three, depending on how keen you are. Firstly, since mushrooms are a fungus you can get fungicides from shops that sell garden chemicals which will...
Mushrooms grow on dead matter - so you could have anything under the ground from a rotting tree root to thick thatch in your lawn. There are no products to control mushrooms. If the mushrooms are...