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Loup
McNeese State Fan
Ferriday
Member since Apr 2019
3592 posts

What's going on with my St Aug?
I put down bonus S weed and feed about a month and a half ago. About a week ago I sprayed some Spectracide weed and feed (2-4d) to kill some of the remaining clover. Did I burn it or is something else going on? It hasn't been hurting for water.
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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3022 posts

re: What's going on with my St Aug?
Looks to be gray leaf spot (fungal issue) LINK - in part caused by environmental conditions (rain, humidity, heat) and likely excessive use of nitrogenous fertilizer and some herbicide stress from the second spray.

I’d suggest you wean yourself away from weed & feed products, and stick with lawn fertilizers only and herbicides only, applied at the appropriate times and at appropriate treatment rates. .

ronk will be here with recommendations - he’s good with diagnosing lawn diseases and suggesting appropriate treatments.

Good close up photos by the way - that always helps with diagnosing lawn issues.


Loup
McNeese State Fan
Ferriday
Member since Apr 2019
3592 posts

re: What's going on with my St Aug?
quote:

I’d suggest you wean yourself away from weed & feed products, and stick with lawn fertilizers only and herbicides only, applied at the appropriate times and at appropriate treatment rates.


Will do, I've just been using what is easily available at the tractor supply. I'm new to this whole game.

quote:

Looks to be gray leaf spot (fungal issue) LINK - in part caused by environmental conditions (rain, humidity, heat) and likely excessive use of nitrogenous fertilizer and some herbicide stress from the second spray.


Thanks


ronk
Member since Jan 2015
2858 posts

re: What's going on with my St Aug?
What craw said. I would apply propiconizole. That usually takes care of a gray leaf spot.


Yaboylaroy
LSU Fan
Member since Mar 2010
1719 posts

re: What's going on with my St Aug?
I’m having the issue with blades yellowing in random spots but no gray leaf spot. Is it due to the excessive amount of rain we (Prairieville) have received lately? My yard tends to stay moist. I fertilized with Lesco 24-2-11 the day after Easter and have spot sprayed with Celsius. None of the yellowing has occurred in areas where I have spot sprayed though.

Eta: Nevermind, I just cant see well. I do have some gray spots when i take a closer look.
This post was edited on 5/4 at 9:35 am


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Loup
McNeese State Fan
Ferriday
Member since Apr 2019
3592 posts

re: What's going on with my St Aug?
Got home and the gray spots have doubled in size. I have no doubt it's the gray spot you posted. It's also showed up in other parts of my yard that I didn't spray the spectracide. I ordered one of the chemicals listed on the ag center link you posted


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ronk
Member since Jan 2015
2858 posts

re: What's going on with my St Aug?
Propiconizole is readily available. You could be spraying it right now.


Loup
McNeese State Fan
Ferriday
Member since Apr 2019
3592 posts

re: What's going on with my St Aug?
quote:

Propiconizole is readily available. You could be spraying it right now.


Thanks, grabbed some from Lowes on my way to work this morning.


trident
Tennessee Fan
Member since Jul 2007
4232 posts

re: What's going on with my St Aug?
HOw often do you spray? Got some of this and sprayed yesterday


ronk
Member since Jan 2015
2858 posts

re: What's going on with my St Aug?
Gray leaf spot isn't the toughest of fungus'. One treatment of propiconizole might do the trick. If not a follow up treatment 21-28 days later is needed.


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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3022 posts

re: What's going on with my St Aug?
quote:

HOw often do you spray? Got some of this and sprayed yesterday

2 week intervals with propiconazole.

But also read this Clemson fact sheet - pay close attention to the treatment section and the recommendation of alternating fungicides. LINK

Another helpful article LINK


Tvilletiger
LSU Fan
Member since Oct 2015
131 posts

re: What's going on with my St Aug?
There is a chance the yard had more weeds then appeared and when you put the weed killer down it killed more of your yard then expected. Give it a little time and see if the grass moves into those spots.


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