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Old 05-18-2011, 12:56 AM
mdlwn1 mdlwn1 is offline
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We spray liquid N at 1/8lb....sometimes a 1/4 if it's Umaxx.
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Old 05-19-2011, 12:53 AM
vvcchamb vvcchamb is offline
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Originally Posted by ted putnam View Post
Yea, at those rates, it only take one or 2 days over 80 to hear the bacon sizzlin. Something else is the "feed grade" Urea. Is it melting properly? Do you have good tank agitation? Does the tank mix become more concenmtrated as the day goes on because of improper mixing if the active ingredients? Many variables but the first thing I'd do is drop the rate/1000 of N.
Heat is not the problem. 60s for highs. I agitate between apps and it's a pressured cross tank agitation.

The N rate is high, but not more than I have always applied. This season is the only variable, and not all lawns are browning. Only a select few, and mostly in areas that are shaded and probably stay damp but I always apply less in shaded areas. That is why I wonder about fungus.
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Old 05-19-2011, 01:13 AM
vvcchamb vvcchamb is offline
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Originally Posted by mdlwn1 View Post
1lb/1000...liquid N....yikes!...with weed killer! Can this thread reaaly go further?
I get the point. But what is the difference this season as opposed to the previous 10? My lawns are the thickest, greenest and most healthy in town. I still wonder about the fungus.
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Old 05-19-2011, 01:16 AM
vvcchamb vvcchamb is offline
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Originally Posted by lazyike View Post
Yea that is suspect, Could it be brown patch???? If we could get some pics. Did you spray these yards last year? Does it look like nitrogen burn?
If it was N burn, there would be a thick green ring around the burn. That is NOT the case here. The effected area tapers off at the edges.
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Old 05-19-2011, 04:14 PM
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GrandMaster GrandMaster is offline
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Originally Posted by vvcchamb View Post
Does the Mec D have the same application rate as 3 Way? That is the only real variable in this equation. I will have to go to the storage shed and get a label to check unless someone can give me an answer.
Yes 1.5oz per k max etc. 4 bags urea for 300gal is little rich for what you need. Someone spiked you with gly...
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Old 05-20-2011, 07:20 PM
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jvanvliet jvanvliet is offline
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anything but fungus?
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Old 01-28-2012, 07:19 PM
Dave Stuart Dave Stuart is offline
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Phenoxy herbicide damage

24D, mecaprop, MCPA are standard phenoxy's used in 3way herbicide mixtures.
Dicamba is a systemic and in the benzoic acid class /also common in 3 way blends.
Then there are the newer chemistries with fast leaf cuticle penetration and translocation that are in today's blends clopyralid & fluoroxypr / trade names confront and momentum.
Mecamine D is composed of 24D, mecaprop and dicamba, the same as the old trimec 992 - it's rates are 3 to 4 pints per acre ( standard for efficacy with this product ) the only difference are the amine salt percentages slightly.

If the turf is herbicide damaged there will be epinasty ( twisting and curling of the leaf from the rearrangement of cells in the leaf mesophyll ) even monocots such as turf grass can only tolerate so much herbicide. This is a key indicator that the broadleaf material was the culprit.
If the urea did the damage the turf will stay erect and become uniformly chlorotic ( yellow ) at 1st, then become uniformly brown / lose its elasticity or cell turgor from salt damage and finally wilt.

Use these as indicators for the future, hopefully you never experience this again.

Dave Stuart MA/ plant physiology, soil science.
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apps , browniing , spray

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