It produces or might be caused by explosive undergrowth that needs power raking or aerating. I aerate twice a year though.
I'm in Northern Indiana. Kentucky / Bluegrass / Ryegrass mix. I water 2 maybe 3 times a week deeply in the morning, never overnight. I keep my blades sharp and decks clean of clutter. I just started cleaning them to stop spreading any of this. I fertilize 3-4 times a year, not even full dose and it's slow release.
This is just destroying my yard. When I power rake some patches just pull up at the root. I've dug in a few spots to check for grubs. Nothing.