View Full Version : Can you identify this fungus?

05-28-2011, 10:56 AM

I planted a new lawn (fescue k31) 3 weeks ago and am afraid that watering too late in the evening and hot weather caused a fungus that is wiping out all

of my hard work and $$. I live in Maryland, I took off of work for 2 weeks to do this and busted my @$$. The property had not had a lawn in 20 years, I

hand picked weeds for 2 days straight on my hands and knees, the list goes on.

Anyway, it started in small circles with the cotton like fungus and ends in small brown patches of dead grass. It is slowly spreading in the front and back yard, I

put down scotts lawn fungus control. If it is pythium I have read I need subdue maxx which is high dollar as you know. Can any of you please help me

diagnose and treat this problem? It is heart breaking, I have attached pictures and thank you ahead of time.

(pics load slow please be patient)







This next picture is the latest taken today one week after noticing the patches.


05-28-2011, 12:06 PM
maybe a too much moisture (irrigation);

Try Cleary Fungicide 3336. May have to do a couple of apps. Don't do too many apps with the same product because fungus will build resistense, maybe two; a good drench with copper sulfate as an alternative wouldn't hurt & it's cheap.

I'm sure the L&O guys will jump in soon.

05-28-2011, 12:19 PM
Thank you very much! I am researching the product you recommended and am going to hold off for a little bit to see what others say. The price does not look so bad I will more than likely try it!

Appreciate your help! :)

jim lero
06-01-2011, 01:09 AM
Does the blades have any lesions? If so are they an hour glass shape that covers the leaf from side to side or do the appear to be on one side or the other? How hot has it been? What has the watering schedule been?

jim lero
06-01-2011, 01:14 AM
Check out this site. Which one is it?

Brown Patch?

Dollar Spot?

My guess is dollar spot.

06-12-2011, 10:33 AM
I agree dollar spot. Irrigate less, and mow to 2 inches max to help it air dry.

I would not have used K-31 for a residential lawn. There are many TTF that are better looking, with similar or better hardiness. Overseed in the fall with TTF.

06-12-2011, 11:36 AM
You need to call a qualified professional.

Thank you.

06-12-2011, 11:59 AM
Where are you located in maryland? From the pictures it looks kind of like dollar spot.

06-12-2011, 12:15 PM
Maybe it varies by region, but around here Scott's Lawn Fungus contains the same active ingredient as Cleary's 3336.

Thiophanate Methyl.

06-12-2011, 01:28 PM
You posted this last week too.

06-13-2011, 03:45 PM
What was the temperature during this? If it was between 60 and 86, then it would be dollar spot. If you have this temp, low nitrogen level, and heavy dew..it brings this on. Once the temps get higher than that, pythium comes into play. The dollar spot symptoms are: leaf blades turn light tan or straw color, damaged area on the grass blade enlarges and forms a white cross section with a dark brown, hour glass border, mycelium is grayish and cobweb-like. Cleary, Tersan and Daconil will control this.
Pythium symptoms start to show after 3 days in a row of high temps, above 90, with high humidity and moisture levels. The infected leaves turn dark, become matted and slimey looking. Subdue and chlorneb will control. Hard to tell from the pictures, but, environmental conditions tell a lot.

06-13-2011, 06:38 PM
For the most part..those pics show some type of "damping off" Too many seeds germinating...guessing you used a wee bit more than 10lbs/1000 on that.

06-13-2011, 10:38 PM
The white stuff looks pretty nasty.