Picture is a example of the most common disease for this time of year, this is called Dollarspot. It generally wont kill a lawn and only effect the top portion of the grass blade, with light fertilization you can push the dead growth off weather and permitting with a few mowings it will disappear.
We are also starting to see our yearly invasion of Nutsedge, if you see this in your lawn it is best not to pull it. It has a “Nut” or seed at the base of its roots that when pulled will break off and reseed in that spot. Chemical control is the most effective control of this grassy weed.
As always we encourage our Facebook friends to contact us with any questions or for a Free analysis of your lawn or landscapes needs.