Did the blades look like this before you prevented the fungus? Preventive fungicide is a bad idea in every lawn.

How often do you water? What time of day? For how long?

How high or low do you mow?

When were the last two times you fertilized and what did you use?

Have you used any other chemicals on the grass this season?

It’s been a problem every year since we bought this house 5 years ago. I had a soil test done last year at the county extension office and my PH was low and they also tested some affected grass from a different problem which turned out to be brown patch. They suggested waiting till the grass came out of dormancy and using propiconozol which is what I did.

I mow on the highest setting and don’t usually water but once a week starting at daylight for about 30 per zone. I hit it with milorganite this past weekend and last fall. Lime was added to raise PH last fall as well. Other than that no chemicals. The brown patch last year was terrible and did a lot of dama and I surely hope this isn’t that coming back or something else like it.

Preventive fungicide is a bad idea in every lawn.

I think blanket statement like that are unhelpful. Try growing fescue in the Transition Zone without fungicide and see where it gets you.

I stand by that blanket statement. There might be certain years with unreasonable amounts of rain, but if you are watering deeply and infrequently, disease should not be a problem.

The problem with preventive fungicide is that it kills off the beneficial fungi in your soil. Those are there for a reason. It would be like killing off all the birds in the world and expecting everything to be the same.