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  #1  
Old 08-07-2011, 09:00 PM
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Blasted Necrotic Ring Spot

This disease is so frustrating.

I have one customer (mowing and app) that has a perennial problem with this disease. He lives in a newer subdev, sodded KBG over clay, and in a wooded area. Lawn is probably 4-5 years old.

I started dealing with this issue last season. I aerated twice, put down an app of Heritage last fall (Oct) and then again late May this season (right after aerating). I plan to aerate again this Sept/Oct.

The disease still cropped up pretty strong this July with the scorching temps and humidity. Frustrating to say the least, and my customer has e-mailed wondering what is going on. At least I have informed him that it is not an easy issue to deal with, and it may take a number of years.

My question is, what else can I do? I have read some about the application of a straight Milorganite fert app, any comments on the efficacy of that proposition? Any other thoughts? Can this disease even be beaten back, or am I leading the customer on (unintentionally)?
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  #2  
Old 08-07-2011, 09:26 PM
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fl-landscapes fl-landscapes is offline
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re-seed with a more resistant kbg?
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Old 08-07-2011, 09:42 PM
dgw dgw is offline
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not sure how you put your fungicide down, but i personally got much better results with spectator at max rate and 2 gallons per k instead of one like i do with everything else
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Old 08-07-2011, 09:49 PM
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Ict npp will knock it down.
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Old 08-07-2011, 09:52 PM
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The sod farm could have used better seed, but didn't. The sod farm could have avoided selling sod from an infested part of the field--but didn't. Customer could have got better sod--maybe.
First, simple thing, is to get new rolls of sod (top quality) and cut the bad spots out square and patch with new pieces of sod. Cut to fit and water. Takes about 5 minutes per spot.

Second, scratch it up thoroughly, and overseed with a high-quality disease resistant seed. You want a Kentucky bluegrass and top perennial rye mixture. Use plenty of seed (about 10 times more than needed, you don't want to do this twice). The bluegrass seldom takes well, but the rye will fill it in--and it is not affected by Necrotic ring spot. A top-quality rye will not match perfectly, but you have to get real close to tell the difference.

http://www.pickseed.com/usa/Products..._shadow_ts.pdf
Moon shodw has excellent resistance. Granite from Pickseed is also good.

Last edited by RigglePLC; 08-07-2011 at 10:01 PM. Reason: link
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  #6  
Old 08-07-2011, 09:55 PM
dgw dgw is offline
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Quote:
Originally Posted by RigglePLC View Post
The sod farm could have used better seed, but didn't. The sod farm could have avoided selling sod from an infested part of the field--but didn't. Customer could have got better sod--maybe.
First, simple thing, is to get new rolls of sod (top quality) and cut the bad spots out square and patch with new pieces of sod. Cut to fit and water. Takes about 5 minutes per spot.

Second, scratch it up thoroughly, and overseed with a high-quality disease resistant seed. You want a Kentucky bluegrass and top perennial rye mixture. Use plenty of seed (about 10 times more than needed, you don't want to do this twice). The bluegrass seldom takes well, but the rye will fill it in--and it is not affected by Necrotic ring spot. A top-quality rye will not match perfectly, but you have to get real close to tell the difference.
using a good rye is another thing the osu extension recommends for this issue
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2 48 inch walker ghs
2 gravely 260 zs
walker with spyker spreader and 35 gallon tank with 8 foot boom
lawnboy 21
bobcat 36 48 wb
redmax trimmers blowers
traler vac 16hp vanguard
scag sw52a-17ka
350 dump

lesco spreaders and tanks
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  #7  
Old 08-08-2011, 09:53 AM
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I should have mentioned we did overseed last Sept. Slice seed job with primarily TTTF (and a small amount of good quality KBG). The seeding took very well.
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7x14 Stealth SE Enclosed with 48" side ramp
08 Toro Z400 48" deck, 21HP Kaw with EZ Vac twin bag
09 Exmark Turf Tracer HP 36"
21" Toro SR4 Super Recycler
Stihl KM90 Kombi w/ straight shaft trimmer & tiller heads
Husqvarna 125B Blower
PG Magnum
Turfco XT5 Aerator
Turfco LS-22 Overseeder
EcoLawn 200 Applicator

I can do all things through Him who gives me strength.
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Old 08-08-2011, 09:55 AM
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Quote:
Originally Posted by R & R Yard Designs View Post
Ict npp will knock it down.
Posted via Mobile Device
what does this mean?
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7x14 Stealth SE Enclosed with 48" side ramp
08 Toro Z400 48" deck, 21HP Kaw with EZ Vac twin bag
09 Exmark Turf Tracer HP 36"
21" Toro SR4 Super Recycler
Stihl KM90 Kombi w/ straight shaft trimmer & tiller heads
Husqvarna 125B Blower
PG Magnum
Turfco XT5 Aerator
Turfco LS-22 Overseeder
EcoLawn 200 Applicator

I can do all things through Him who gives me strength.
Philippians 4:13
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  #9  
Old 08-08-2011, 06:13 PM
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It will kill it. Don't trust me call bill at Ict we used 12 gallons this year at lawns look great
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  #10  
Old 08-08-2011, 06:17 PM
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Hi buddy -- I would not spend money of fungicides.

https://www.extension.iastate.edu/st...roductID=12606
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