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Need help ASAP! New grass possible fungus????

8 years ago

Guys I need some help ASAP please! I recently overseeded the yard with a KBG/TTF blend from Scott's. It has started growing very well and have mowed it twice. Last week or so we have gotten TONS of rain here in SouthEast MO. Well I noticed this morning lots of what looked like brown blades of grass scattered about. After looking closer they blades are brownish with little bumps and blackish/purplish spots?? little googling says possibly "Leaf Spot". Don't worry I took some pictures of the "infected"...

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dchall_san_antonio

8 years ago

That is poster child fungal disease. I would treat that with corn meal at 20 pounds per 1,000 square feet. If you want to use a chemical fungicide, you could. If you use a chemical then follow that up with some compost after the disease clears up.

This time of year it might be too late to see any improvement. The spotty blades you see will not recover, but new grass should come in spot free.

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Comments (7)

dstackss
Original Author
8 years ago
so it is fungal? Is that Leaf spot or just fungus in general? I have not done anything organic yet. I intend to in the future but the only thing i have done so far is over seed and some starter fertilizer. was just doing some quick reading on the cornmeal and seems like you need presently living microbes to eat the cornmeal? not sure there. I may go chemical to try and stop this then cornmeal in the future along with composting. will the brown grass keep browning back or will it turn around and grow more? Any Chemical in particular that is recommended ? I am worried being this late in fall the local stores have hidden their lawn care chemicals and are already putting out Easter decorations?! jk on that 1 but i hope I can find some?
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Hi, Thanks for the reply! Well, it's Iowa. So the saying goes, if you don't like the weather, wait 5 minutes. :) It's been mostly hot and humid all summer, 80+ degrees. I don't know what "prolonged" periods of rain are, but it has been storming a full 8 hours about once or twice a week this past month. I watered about every other day in the spring at around 5pm until the grass was established, and about the same lushness as the already growing grass (middle of the lawn.) I stopped watering after that since it rains 1-2 times a week. I have no idea what kind of grass I have. I'm guessing some sort of bluegrass/ryegrass mix from my quick google search. The good grass on the center of the lawn is very dense. I'd like to match that the best I can in the dead spots. Planning on seeding a mix. The arrow in the second picture points west. The problem started on the east side of my lawn. Weirdly though, peeping through my wooden privacy fence, my neighbors grass (that would be touching my grass in that first picture) is green and looks undamaged. I have no idea how long the mud lasted. I moved into the house in mid-November, and immediately raked a ton of leaves that had been sitting for months off the lawn and discovered all the mud. After winter, I planted grass and it seemed fine. The grass was already growing (no new seed) in the "starter spot" of the dying grass. But the last picture (North corner of yard) was new grass this year.
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reeljake
8 years ago
I say get on the corn meal organic thing right away. It takes time to develop...
dstackss thanked reeljake
dchall_san_antonio
8 years ago
Right now you absolutely have the living microbes you need. Once you spray with a fungicide, you will almost certainly not have the living microbes you need. Corn meal works by attracting a predatory microbe. That microbe is a fungus and will be killed off by a chemical fungicide. So if you want to try them in order, try the corn meal first. Then if you don't like the results in 3-4 weeks, spray the chemical. You can't do it that easily the other way around.
dstackss thanked dchall_san_antonio
dstackss
Original Author
8 years ago
in 3-4 weeks winter will be here full swing. is that to late to keep trying the fungicide? or do I need to wait till spring? where do I go about getting cornmeal like that? Walmart or a feed store? do I just spread it with my broadcast spreader or by hand? and how much can I over do it? thanks for the quick responses people I appreciate it.
reeljake
8 years ago
You can get it at the grocery store or a feed store, depending how much you want. It can go down pretty thick, especially if you're giving it all winter to decompose. The chemical will still work in the cold, but the organics will not work as well once the temp starts really dropping
dstackss thanked reeljake
dchall_san_antonio
8 years ago
You have too much corn meal when you cannot see any grass under it. If I accidentally dump a load on a spot I kick it off with my foot. Corn meal has an affinity to absorb humidity out of the air and clump up. Thus, in South Texas, it will not flow through my spreader. So I toss it out by hand.

I get corn meal at a feed store in 50-pound sacks. I believe it comes in 20 kilo sacks up north. You can also find corn flour in bulk at grocery stores that cater to Hispanic communities. It's called harina de maíz. Don't get the premix stuff for making tortillas.

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