It also wouldn't hurt to rule out any irrigation distribution problems by checking to see if the soil in that area is drier than others. Also look for any insects - in those spots. White grubs eat off the roots and make turf easy to roll up like a carpet if damage is severe. You are usually out of the woods by the end of October from this disease. Also look for any insects - in those spots.
White grubs eat off the roots and make turf easy to roll up like a carpet if damage is severe.