[Schaef]

I had this spot in my lawn that was bare and seeded about 5-6 weeks ago. I noticed yesterday morning there was a dew web in a patch of the grass.
I left the grass longer than normal due to this crazy heat wave we have going on and I think that may have caused this issue(this seeded patch was longer than the rest of my grass).

I cut the grass last night, and basically half the seeded patch is brown. I believe it's pythium blight or dollar spot maybe (there are a few smaller round brown spots)

Is my only option to reseed this patch? Im guessing the disease/fungus killed it off. Also, what are the chances of it spreading and how can I stop it?

I'm in southern Ontario so I don't have fungicide on hand or quick access to it.

 

[Turfguy93]

Have you still been watering the patch?

 

[Schaef]

I watered the patch early this morning, ill do the same tomorrow. Im hoping that may bring some of it back but who knows.

 

[Turfguy93]

Looks like it got too dry, baby grass doesn't have near the roots that your established grass has. Have you seen any mycelium?

 

[Schaef]

Yes, there was a small patch yesterday morning. I think I let it get too long and all the dew and heat caused a fungus.

 

[stotea]

How much seed did you use? Looks super thick for grass that young, which is actually a bad thing since it can essentially strangle/out-compete itself.

 

[Schaef]

Not 100% what the seed rate was, maybe like .5lb (its about 40sqft). When it started growing in super thick is when I realized I probably put too much down. I think between it being thick/young/too long/heat wave caused some fungus to grow.

EDIT. I may hand aerate that patch with a small core aerator to thin it out a bit

 

[Suburban Jungle Life]

If you see a web of white with dew spots, that might be pythium. Without fungicides, I would use a broom to sweep it so it's gone and also take a long garden hose and drag it across your lawn every morning. This will reduce the water sitting on the grass and reduce the chance of fungus. Not a guarantee though...

 

[Turfguy93]

Dragging Pythium will spread Pythium(streaking).