If looking out upon your lawn and your seeing brownish areas with a tint of red in it then its most likely Red Thread. Dont waste your money on fungicides in the Ohio Valley! waste of money. Fungicideshave to stay dry on the leaf blade or it won’t work. here are some simple but effective.
1- Sharp mower Blades
2- change cutting height weekly
3- apply a (light) fertilizer, depending on heat and rain
just some simple tips that don’t cost alot.