lawn

As with weeds, mushrooms and toad-stools can be a continuous intermittent presence in the landscape.
The appearance of mushrooms and toads-tools in the lawn is a good indication of soil fertility. These and other fungi serve an important role in Nature's re-cycling of organic carbon containing molecules.

You can suppress the growth of Fungi by watering affected areas with a solution of one ounce of IRON SULFATE in three gallons of water applied at the rate of about one gallon per square yard. Iron Sulfate and commercial Broad-spectrum FUNGICIDE chemicals can be used to control/prevent FUNGI and MUSHROOM outbreaks. Iron Sulfate and fungicides can be found at garden/Farm supply stores. Commercial FUNGICIDES are widely available, check hardware and department stores.

Thanks ken bonsor for your help,i will take that on board