I caught up with zwaldo somewhere else. I'm thinking he might have chinch bugs instead of fungus. The effect is similar but the cure is much different.

Following your advice, I put down cracked corn yesterday. But I still wonder, does cornmeal or cracked corn really work? I know you said it hundreds of times that it worked for you but is it possible that the disease could have gone away on its own? I know cooler temperature and lower humidity can stop fungal outbreaks. Only hundreds? Seems like more. I've never seen cooler temps or lower humidity affect my disease spots. I had it for several years in the same place before I discovered corn meal. There are no scientific studies showing that it works, but for some reason there are scientists (Parsons and Chalker-Scott) who, without the benefit of studies of their own, claim that it does not work. At this point you would have to call it anecdotal evidence from around the planet. Anecdotal evidence is still evidence and it has peer review. It just does not have scientific peer review. It has peers through the other anecdotes you see posted here and other forums. What I've found here and abouts is that there are people who refuse to believe it works. Furthermore they refuse to spend $5 for some corn meal and try it. They will spend weeks arguing with me about it, but they will not try it. Having said all that, I've been using successfully since 2002. Right away (2003??) people here at GardenWeb reported that corn meal had no effect at all on red thread or rust. I don't get those diseases. So when someone reports they have red thread or rust, I don't reply with corn meal.

Here is a picture I took this morning of the side of my lawn above the leach fields. As you can see, the brown area is a well-defined V-shaped, which mirrors the placement of the septic system's leach fields. This area of the lawn was a respectable green lawn a few weeks back. However, with the lack of rain over the past month in the southwest Connecticut area, the grass over the leach fields has been the first to go dormant as the soil above the leach fields cannot adequately retain moisture unlike the rest of the lawn. I was baffled the first few years after having moved into the home when the lawn would go dormant in the summer in these same areas and interestingly enough would produce the same type of outline. After having seen a schematic of the placement of my septic tank and the corresponding leach fields, I quickly realized that the brown lawn over these areas is something probably out of my control.

You can do it now. Just get one of the lawn patch kits (carried by any box store) or a small bag of seed and fill in the area. The patch kits work quite well for small areas as they usually come with a cellulose mulch product that protects the seed and help keep it moist until germination. Also protects against weed seeds blowing in. Most will have some starter ferts included as well. If you just get a bag of seed you will need to go through all the steps like you were seeding or overseeding a lawn. The kits just shortcut that for you.