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Re: [OM] IMG: Information Needed on Cause of Lawn Circle

Subject: Re: [OM] IMG: Information Needed on Cause of Lawn Circle
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 16 Aug 2009 16:26:17 -0400
I dunno.  Are you itching?  :-)

Chuck Norcutt

Clay Nichols wrote:
> Can you get the stuff in Iowa??
> 
>>>> Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> 08/16/09 2:58 PM >>> 
> Sounds like maybe "fairy ring fungus". 
> <http://en.allexperts.com/q/Lawns-725/Ring-dead-grass.htm> 
> That link gives the treatment as iron sulfate. But this link 
> <http://turfgrass.com/ubb/Forum13/HTML/000041.html> 
> gives an interesting treatment using ordinary corn meal. It says 
> ----------------------------------------------------------------------- 
> In case anyone missed the answer to this on another message, I'll repeat 
> it here. 
> 
> Of course fairy rings are caused by fungus, hence the mushroom circles. 
> Sometimes the mushrooms don't grow but the grass will die in a perfect 
> circle. Sometimes you will see lots of circles ranging from 6 inches in 
> diameter to 50 feet in diameter. 
> 
> The cure for all (yes, all!) fungus disease in turf is whole ground corn 
> meal. This is the same corn meal found at the grocery store. I get mine 
> at the feed store in a brown bag labeled, "feed." For $5-$6 you can get 
> 50 pounds at the feed store. The application rate for prevention and 
> fertilization (it is also a great organic fertilizer) is 10 pounds per 
> 1,000 square feet ($0.0011 per square foot). The application rate for 
> existing fungal disease is 20 pounds per 1,000 square feet ($0.0022 per 
> square foot). Don't let the feed store folks get you confused with corn 
> gluten meal. They are two different products. You want corn meal, chops, 
> or any whole corn kernel that is ground up. If you try whole corn seeds 
> like some animal feed, you will end up with a field of corn. It must be 
> ground. 
> 
> The Texas A&M University at Stephenville has found that ground corn meal 
> works like a fungicide because it attracts a member of the Trichoderma 
> (try-ko-DER-mah) fungus family. Trichoderma acts like a disease to the 
> disease-causing fungus and kills it in about 3 weeks. If I remember 
> right, the Trichoderma attacks the cell walls of the other fungus. 
> 
> In peanut fields, corn meal works as well as crop rotation for 
> eradication of many different fungi diseases. This means that peanut 
> farmers no longer need to spray fungicides nor do they need to rotate 
> their peanut fields out of the prime cash crop. 
> 
> The same fungi that attack peanuts also attack turf 
> ------------------------------------------------------------------ 
> 
> Chuck Norcutt 
> 
> 
> 
> Jim Nichols wrote: 
>> I know there are many knowledgable people on these two lists. I am looking 
>> for a hint on the cause of a circle of dead grass that is very well defined 
>> on my lawn and extends, faintly, into the adjoining lawn. 
>>
>> I recall that a cherry tree once existed in this general area in the 
>> neighboring lawn. I had a maple in my yard that was damaged by a wind storm 
>> and removed. However, neither of these was near the center of the circle. I 
>> have heard that maple roots can cause problems in grass, but no 
>> previously-existing root circle matches what I now observe. 
>>
>> Anyone got a suggestion? 
>>
>> http://gallery.leica-users.org/v/OldNick/Lawn+Circle.jpg.html 
>>
>> Jim Nichols 
>> Tullahoma, TN USA 
-- 
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