What is a good product for fungus in a fescue lawn?

A granular fungicide will be the best treatment since the liquids tend to wash away in rains or during watering. Your best bet is to prevent this from happening again.

Do you have branches hanging low over this area preventing sun/air from hitting this patch of turf? If so, cut those back.

A healthy turf isn’t attractive to fungus. Aerate and fertilize/feed your lawn at least once a year. If this area of turf has compacted soil besides aeration, you may need to ammend the soil for better drainage.

University of California, Davis can assist you in identifying your precise fungus so you can choose the best fungicide to treat it.

I just applied some Scotts granular fungicide. But, after speaking with my neighbors, there is the possibility this is not fungus but rather rabbits. We have lots of them hanging out on our lawns. Suspect their urine and droppings could be ruining lawn.

@Charles I have lots of rabbits, squirrels and chipmunks in my yard. Mushrooms and brown patches are no where to be found, ever.

Rabbit urine and droppings would most likely do the opposite. You’d see green patches. It’s also not common for them to sit/urinate in anyone spot long enough to cause over fertilization.

“Rabbit urine and droppings would most likely do the opposite. You’d see green patches. It’s also not common for them to sit/urinate in anyone spot long enough to cause over fertilization.”

I did some internet searching on this and found that the urine, and maybe the droppings too are either extremely acidic or high nitrogen and they will indeed “burn” the lawn.