[Croyal5]

My Bad, I put down GrubEx in early May after I saw signs of grubs, small holes in the turf.
The brown patches started late May to early June.
I suspect I created the perfect scenario for fungus when I was watering at night as the weather started heating up. I had also put down nitrogen in early May.
It looks as if the damage has stopped spreading at this point. Not sure how to move forward at this point. Is this going to be repaired or do I need to start over ?
Like I said earlier, I’m way above my pay grade on this project. The green looks great, just having issues with the tee boxes.

 

[Croyal5]

If you're trying to maintain bentgrass you're going to need a lot more fungicides than DiseaseEx. You'll need to apply them frequently and watch the grass closely. Get your watering schedule and practices in line so that the grass stays wet for the least amount of time as possible while keeping the water up to it. There's a reason why golf courses remove the dew in the morning. Bentgrass is incredibly finicky.

I’m finding that to be true. I’ve added gravex 20 ex to the regime as well.