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  #1  
Old 09-30-2012, 09:27 AM
Boyntonstu Boyntonstu is offline
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Roundup 2% Glyphosphate vs mixing 41%

We are trying to keep a gravel area weed free.

The Roundup label indicates that it contains 2% Glyphosphate.

All 41% Glyphosphate products indicate that 2-2/3 oz/gal will give a 2% mixture of 41% Glyphosphate.

They indicate that this 2% solution is the correct strength for most weeds.

This is NOT the same as the Roundup 2% Glyphosphate products.

Actually .41 x 2% = .82% of Glyphosphate.

Am I missing something?


IOW Is 2% Glyphosphate the optimum mixture, or is .82% adequate for most weeds?

P.S. Do you add anything else to your Glyphosphate mixture?
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  #2  
Old 09-30-2012, 09:32 AM
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vencops vencops is offline
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Here's a hint.....Are you using water as an admixture? How did you account for that (what % does the water account for)?

Yes. I usually add ammonium sulfate and diquat to "most" of my gly batches.
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  #3  
Old 09-30-2012, 09:40 AM
Boyntonstu Boyntonstu is offline
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Quote:
Originally Posted by vencops View Post
Here's a hint.....Are you using water as an admixture? How did you account for that (what % does the water account for)?

Yes. I usually add ammonium sulfate and diquat to "most" of my gly batches.
Are you using water as an admixture? yes, 2-2/3 oz + water = 128 oz.

That is a 2.66/128 = 2% solution.

Have you compared Pelargonic acid to amminium sulphate and dequat?
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  #4  
Old 09-30-2012, 09:53 AM
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cgaengineer cgaengineer is offline
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Why not use a sterilant?
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Old 09-30-2012, 10:04 AM
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vencops vencops is offline
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Quote:
Have you compared Pelargonic acid to amminium sulphate and dequat?
No, I haven't. I'm not familiar with the product.

I like the flexibility of the AS/Diquat/gly.....and, I'm familiar with them (in various mixtures and individual strengths). Just a confort thing, I guess.

Last edited by vencops; 09-30-2012 at 10:09 AM.
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  #6  
Old 09-30-2012, 10:26 AM
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Ric Ric is offline
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Originally Posted by cgaengineer View Post
Why not use a sterilant?
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IMHO Soil Sterilants have to much chance of going wrong. I don't want or need any Collateral Damage. For years I added Pre-Merege to my Roundup instead of using a Soil Sterilant. This last year I tried Roundup Extend with some real sucess. From about Nov to June rainy season I got excellent control. However with the heavy rain this summer nothing seemed to work. But also remember My soil/sand has little or no chemical holding power so it might work better for you.





Quote:
Originally Posted by Boyntonstu View Post
Have you compared Pelargonic acid to amminium sulphate and dequat?
These are Contact Herbicides that work quick, but only on the surfaces of the plant it touches. They do not get the roots which is Monsanto's big Marketing Pitch.

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  #7  
Old 09-30-2012, 10:33 AM
ReddensLawnCare ReddensLawnCare is online now
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Ric,
Do you feel that an area that is approximately 28,000sf of gravel bed, almost completely flat is suitable for sterilants. I was considering Mohave. The area is used for parking at a storage facility that I maintain. I have tried using produece with little success. My biggest concern is that 100' away is 5 retention and two silt ponds. If not Mohave, what else would you recommend. I currently am spraying RU once a month
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Old 09-30-2012, 10:44 AM
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White Gardens White Gardens is offline
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Might want to consider a pre-em such as liquid dimension to do those gravel areas.

Might take a couple of seasons of control to get it where you want, but eventually you might only be doing 2-3 apps a season.

That or at least it will minimize the amount of RU you are using each app.


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  #9  
Old 09-30-2012, 10:45 AM
Boyntonstu Boyntonstu is offline
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Quote:
Originally Posted by ReddensLawnCare View Post
Ric,
Do you feel that an area that is approximately 28,000sf of gravel bed, almost completely flat is suitable for sterilants. I was considering Mohave. The area is used for parking at a storage facility that I maintain. I have tried using produece with little success. My biggest concern is that 100' away is 5 retention and two silt ponds. If not Mohave, what else would you recommend. I currently am spraying RU once a month
Posted via Mobile Device
The most potent sterilant is supposed to be Pramitol 25E.

Tractor Supply has it.

What % RU are you using? Alone or with something added?

How many weeds do you see after a month?
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  #10  
Old 09-30-2012, 10:51 AM
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Ric Ric is offline
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Quote:
Originally Posted by Ric View Post
IMHO Soil Sterilants have to much chance of going wrong. I don't want or need any Collateral Damage..
Quote:
Originally Posted by ReddensLawnCare View Post
Ric,
Do you feel that an area that is approximately 28,000sf of gravel bed, almost completely flat is suitable for sterilants. I was considering Mohave. The area is used for parking at a storage facility that I maintain. I have tried using produece with little success. My biggest concern is that 100' away is 5 retention and two silt ponds. If not Mohave, what else would you recommend. I currently am spraying RU once a month
Posted via Mobile Device
You are asking the wrong person. I tried to make my opinion clear about Steritants in my above post. I have never used a sterilant and don't have any plans of ever using them. I do treat some Gravel Parking Lots and as stated above.

.
__________________
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"TG doesn't give a rats ass about being "Responsible" as long as sales/production quotas are met. That's it in a nutshell. A recipe for disaster IMO." Ted Putnam 2/28/14

You can lead a Donkey to water but you can't make the Jackass Drink

"As Americans you have the right to be stupid." John Kerry

"Life is tough, but it's tougher when you're stupid.” John Wayne.
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