No, it won't work. Outside of powerful fungicides, I really don't think there is any way to prevent these mushrooms. If you want to lessen their occurance then you should pick them out of your lawn on a regular basis (a few times a week, or whenever you see them if you have the time).

Never heard of that one.

There are a couple of tools in the organic bag of tricks. Have you tried ordinary corn meal, used coffee grounds, or milk? The application rate for corn meal and coffee ground would be 20 pounds (dry) per 1,000 square feet. For milk you can use it full strength or any dilution down to 3 ounces per gallon of water. You can use spoiled milk, chocolate, skim, whole, goat's, or any kind of milk. There might be a preference for unpasturized (raw) milk from those specialized locations which sell it.

Organic materials usually take 3 full weeks to see improvement because of the biological processes that have to happen. Essentially the corn or coffee attracts certain fungi to decompose the grains. Then those fungi attract the predatory tricoderma fungi which will then go on to kill the disease fungi. At least that is the theory. Sometime it works better than others.

Where do you live?

What kind of grass do you have?

What is your soil like?

How often do you water and for how long?