Yellow Lawn

Last week I spent some time aerating my lawn, I went away at the weekend to come back to this...!

Can somebody please help me understand what's going on here and how I can resolve it?

Thanks!

 

It may have nothing to do with aeration but it seems a bit coincidental. I've read that it could be to do with nitrogen and/or iron levels and I've also read that it could be a fungus issue?

 

Russ, no aeration would not have done that

However, it looks like rust to me.....maybe exacerbated by the hot dry summer and only now apparent

I would simply apply an autumn fertiliser

 

Thanks Verdun, I'll give it a go!

 

Yes, it is rust. Don't worry about it; come spring and there will be new growth and it'll be gone.

 

Looks pretty spot on. It’s caused by fungi in the genus Puccinia and is commonly known as a low nitrogen disease. An Autumn feed may help it to recover.
To double check get a white cloth and rub the leaf and it should show brown marks.