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View Full Version : How much RoundUp per gallon.


LouisianaLawnboy
02-22-2009, 03:55 PM
How much RoundUp do you use per gallon? I have a 5 Gallon backpack and I just paid a :dizzy::dizzy:145.00:dizzy::dizzy: for 2.5 gallons of generic RoundUp concentrate.(It has 41% glycosphate)

I will be using it for spot weed control.

Cuttinitclose
02-22-2009, 04:02 PM
I'm confused. You paid 145 for round up? I hope it was the sprayer. Good Lord!

ED'S LAWNCARE
02-22-2009, 04:02 PM
It should tell you on the bottle (or the explaination packet). I generally use 3oz/gallon

Tommy Boy
02-22-2009, 04:05 PM
2 Oz's Per Gallon. Get a tip bottle so you will not have to carry measuring cups around

JB1
02-22-2009, 04:07 PM
not over a gallon for five gallons.

burge19
02-22-2009, 04:14 PM
1 to 2 ounces per gallon of water... depending on how much you want to put on

Fvstringpicker
02-22-2009, 04:59 PM
for spot weed control I've had good success with 100:1 mix. 128 oz/gal = roughly 1 oz of 41% Glyphosate to 1 gallon of water. Remember, when you're spot spraying you're typically hitting the plant with more than the recommend dose per 1000 sq ft.
You may want to check with your state about herbicide application requirements before spraying.

LouisianaLawnboy
02-22-2009, 06:25 PM
I'm studying for my Private Pesticide Applicators License now.

Yes 145.00 was for the RoundUp and not for the sprayer. It is 2.5 gallons.

metiernan
02-22-2009, 06:30 PM
Use Glystar, it is alot cheaper

LouisianaLawnboy
02-22-2009, 06:35 PM
Use Glystar, it is alot cheaper

Where can I get if from? Is it as effective.

Lbilawncare
02-22-2009, 06:49 PM
I think most of the answers to your question can be answered by getting your license. The first thing you should know is to read the label. Just to make sure, the areas you are spot spraying must not be on grass. Round-up is non-selective and will kill the grass too. I use 1.5 to 2 oz per gallon with marker dye to be sure I know where I've been. Good Luck with your testing.

LouisianaLawnboy
02-22-2009, 06:57 PM
I think most of the answers to your question can be answered by getting your license. The first thing you should know is to read the label. Just to make sure, the areas you are spot spraying must not be on grass. Round-up is non-selective and will kill the grass too. I use 1.5 to 2 oz per gallon with marker dye to be sure I know where I've been. Good Luck with your testing.

The license is stupid! It is the same license for people wanting to do pest control, crop spraying, etc.

So the info is really broad and inclusive.

The label is way too complicated to understand. It gives everything in spraying per acre.

Also what I mean by spot wead control is cracks on the concrete, fences, flower beds, and ditches.

JB1
02-22-2009, 07:03 PM
The license is stupid! It is the same license for people wanting to do pest control, crop spraying, etc.

So the info is really broad and inclusive.

The label is way too complicated to understand. It gives everything in spraying per acre.

Also what I mean by spot wead control is cracks on the concrete, fences, flower beds, and ditches.




maybe if you can't read it or understand it , you shouldn't be spraying. The label is the law.

LouisianaLawnboy
02-22-2009, 07:08 PM
maybe if you can't read it or understand it , you shouldn't be spraying. The label is the law.

I have read the label. I'm aware it's the law. I'm saying I do NOT understand it's mixing instructions.

traman
02-22-2009, 07:08 PM
How much RoundUp do you use per gallon? I have a 5 Gallon backpack and I just paid a :dizzy::dizzy:145.00:dizzy::dizzy: for 2.5 gallons of generic RoundUp concentrate.(It has 41% glycosphate)

I will be using it for spot weed control. the walmart here in fl. sell a product called eliminator,its the same strength as the round up 41% glycosphate i mix 1.5 ozs per gal ,it cost 26 dollars per half gal which comes out to 78 dollars for 2.5 gals

LouisianaLawnboy
02-22-2009, 07:10 PM
the walmart here in fl. sell a product called eliminator,its the same strength as the round up 41% glycosphate i mix 1.5 ozs per gal ,it cost 26 dollars per half gal which comes out to 78 dollars for 2.5 gals

I'll check into it. I know it was the same price at Lowes 129.00 + taxes. I've used eliminator I don't find it very effective.

JB1
02-22-2009, 07:12 PM
I have read the label. I'm aware it's the law. I'm saying I do NOT understand it's mixing instructions.




its called math and you will see questions about that on the test, so you better be learning it.

Grits
02-22-2009, 07:16 PM
You don't seem educated enough to be using chemicals. I am by no means saying you are dumb. You need to study up on chemicals and math. The label is a VERY important part of chemical use. Do not apply chemicals without being able to read and understand the label. You have to know how to convert the application numbers to what you will be spraying. Do a little research, get licensed and be responsible.

Daily Lawn/Landscape
02-22-2009, 07:23 PM
Don't mean to be rude, but if you don't know how to figure out how much you need to add per gallon you might want someone to teach you now, before you take the test. Or you won't pass it.

Good luck on the test.

James

ED'S LAWNCARE
02-22-2009, 07:28 PM
the walmart here in fl. sell a product called eliminator,its the same strength as the round up 41% glycosphate i mix 1.5 ozs per gal ,it cost 26 dollars per half gal which comes out to 78 dollars for 2.5 gals

The math on that comes out to $130 for 2.5 gals of eliminator. I buy groundskeeper pro from tractor supply 50% glycosphate. Last time I checked $119 for 2.5 gal

LouisianaLawnboy
02-22-2009, 07:37 PM
its called math and you will see questions about that on the test, so you better be learning it.

I know Math! I just took the ACT and scored a 20 in Math. I have read the book where it talks about mixing. It does not give you any help. There are NO conversion problems on the test. The label gives you mixing instructions for sprecif weeds. This is a VERY common herbicide and I'm trying to find out what everyone uses for everyday use.

traman
02-22-2009, 07:38 PM
The math on that comes out to $130 for 2.5 gals of eliminator. I buy groundskeeper pro from tractor supply 50% glycosphate. Last time I checked $119 for 2.5 gal i stand corrected ,no wonder i always road in the back of the bus

LouisianaLawnboy
02-22-2009, 07:47 PM
i stand corrected ,no wonder i always road in the back of the bus

Hilarious. It's RODE.

dishboy
02-22-2009, 07:49 PM
If you use a wetting agent 1.25oz per gal will give satisfactory results.

david shumaker
02-22-2009, 08:14 PM
In VA you also need the "Right-of-Way Pest Control" license to spray cracks in concrete, along fence lines, etc. This is a different license than the license needed to spray turf. You might have to have this license in LA also.

Grits
02-22-2009, 09:06 PM
BTW, it is Glyphosate.
I get 40% and use 2oz per gal.

ED'S LAWNCARE
02-22-2009, 09:12 PM
BTW, it is Glyphosate.
I get 40% and use 2oz per gal.

I might know math but I spell like crap:laugh::laugh:I should use spell check

PerfectEarth
02-22-2009, 09:14 PM
Well, this thread is a shining example of what's wrong with our industry.

3 oz./gal. for me.

Runner
02-22-2009, 09:14 PM
Tell me more about this glucosphate or glycosphate or whatever it is....

sandman23
02-22-2009, 09:37 PM
Tell me more about this glucosphate or glycosphate or whatever it is....

Glyphosate is a non-selective systemic herbicide. It is the main ingredient in RoundUp and was but is no longer under patent. Now there are generic versions such as Glystar. Just make sure it is 41% Glyphosate.

$145.00 for 2.5 gallons is about right. Mix at 2 ounces per gallon.

Fvstringpicker
02-22-2009, 09:38 PM
The label is way too complicated to understand. It gives everything in spraying per acre.

Divide the oz per acre by 43.2 for coverage per 1000 sq ft. You will have to calibrate your sprayer by marking off 1000 sq ft, spraying it (with water) at your normal speed and measuring how much you water you use. For example, if you use 1-1/2 gallons, you will mix the appropriate amount of chemical per 1000 sq ft (from the calculation above) with each 1-1/2 gallons of water.

Runner
02-22-2009, 10:49 PM
43.2??? Where does this number come from?

VARMIT COMMISSION
02-22-2009, 10:56 PM
It should be 43.5

rcreech
02-22-2009, 11:08 PM
Shouldn't really get into this thread as it is kinda sad but.....

WOW!!!!

41% Generic Gly here is running between $22 and $25!

JB1
02-22-2009, 11:10 PM
now your just confusing him more.

VARMIT COMMISSION
02-22-2009, 11:12 PM
I paid $76.00 a 2 1/2 last week

Turf Dawg
02-22-2009, 11:38 PM
I get the Eraser brand 41% gly with sur in a 2.5 gal container. In 07 it was around 45.00 bucks. Last year it was $97. Now it is $112. Boy I hope they get Chinas' air clean fast.

LouisianaLawnboy
02-23-2009, 01:25 AM
Shouldn't really get into this thread as it is kinda sad but.....

WOW!!!!

41% Generic Gly here is running between $22 and $25!

For what amount???

LouisianaLawnboy
02-23-2009, 01:26 AM
I paid $76.00 a 2 1/2 last week

Where??? I'll call them and have them ship it to me.

LouisianaLawnboy
02-23-2009, 01:27 AM
Glyphosate is a non-selective systemic herbicide. It is the main ingredient in RoundUp and was but is no longer under patent. Now there are generic versions such as Glystar. Just make sure it is 41% Glyphosate.

$145.00 for 2.5 gallons is about right. Mix at 2 ounces per gallon.

Excellent post. Thanks.

Runner
02-23-2009, 01:36 AM
Just make sure it is 41% Glyphosate.
$145.00 for 2.5 gallons is about right. Mix at 2 ounces per gallon.

And this will cover how much area?

LouisianaLawnboy
02-23-2009, 01:42 AM
And this will cover how much area?

I think he is talking about using it in a backpack sprayer for spot weed control.

Green Up
02-23-2009, 09:18 AM
The instructions call for 1-3 oz per gal of water. I use 2 oz per gal. I have had the best results with this mixture.

rcreech
02-23-2009, 09:57 AM
For what amount???

Per gallon!

cod8825
02-23-2009, 10:25 AM
Sometimes we need to ease up a bit with people posting on here on how much this how much that. For some we might not have had much chance to have somebody train us and last all of us have brain farts. I can't tell you well actually I can that I meant for a .5 lbs mixture in my tank and sprayed a .25 lb of Nitrogen. We all do from time to time. I spray 12oz. per gallon in my back pack. JK I do 2 oz. per gallon from a 4 gallon piston pump back pack. I go with the cheapest stuff from our local Ag sometimes it has surfactant sometimes it doesn't.

VARMIT COMMISSION
02-23-2009, 11:42 AM
I personally think that Roundup or generic gly. has the most confusing label of any chemical I use. Almost all labels have a minimum and a max amount of ai. Pull any label I have and its simple. Round-up just isnt green guy (and I aint talking tree hugger I mean newby)friendly. My label is 65 pages long. (printed off computer) If a new guy read it page for page like he should he would obviously have questions. Isnt that what were here for? Admit it, it aint the easiest label to understand!

nik
02-23-2009, 11:59 AM
I have read the label. I'm aware it's the law. I'm saying I do NOT understand it's mixing instructions.

There should be instructions on mixing for backpack sprayers in the label. That is for Monsanto's glyphosate products and for the sub-registered glyphosate products.

It is a long label but after the first time you go through it closely you'll be able to hone in on the parts that pertain to what you need to do. It's so bloody long because of the tons of different crops and application sites. You could get a product with a smaller label for just what you needed and I am sure the chem companies would charge you that much for what they would then call a "specialty" product.

Fvstringpicker
02-23-2009, 02:22 PM
43.2??? Where does this number come from?

It should be 43.5

V.C. is correct. I hit the wrong key. There is 43,560 sq ft in one acre so dividing by 43.5 will give the equivalent amount of product per 1000 sq ft.

EagleLandscape
02-23-2009, 04:19 PM
43.5 should be the dividing number. there are 43,560 sq ft in an acre, if the directions are per acre, divide by 43.5 to get how many ounces per thousand.

that is a conversion, you will need to not only know it so you won't kill someone, but also so you can stay competitive. I just finished a bid on 18 acres of turf, beds, and shrub spraying. IT WAS IMPERATIVE that i knew how to mix everything properly so I wouldnt overbid (not get the contract) and i wouldnt underbid (lose my ass on the job).

$15,000 of this job was spraying and spreading alone.

know your numbers, and know how to read the labels. IT IS THE LAW. fines are big if you spray without a license. they are $2000 + here in texas. not something you want to mess with. Plus, I turn people in without a license. Good thing you don't live in Texas

Runner
02-23-2009, 06:48 PM
V.C. is correct. I hit the wrong key. There is 43,560 sq ft in one acre so dividing by 43.5 will give the equivalent amount of product per 1000 sq ft.

I know,...And I know that YOU knew that...I was just razzin' ya.:waving:

Runner
02-23-2009, 06:56 PM
The instructions call for 1-3 oz per gal of water. I use 2 oz per gal. I have had the best results with this mixture.

So how much of this glu-phosphate stuff do I need to mix in my backpack if I need to do an area 50'x50' (2500 sq. ft)?

Green Up
02-24-2009, 09:24 PM
I spary with a 250 gal diaphragm sprayer. What are you trying to kill and are you wanting to kill all grass there?

Green Up
02-24-2009, 09:27 PM
All you will have to do is mist over the top of the 2500 sq ft. I use a back pack and spray crack in side walks, flower beds, around building and etc. Can you tell me more about what you are trying to get rid of?

LouisianaLawnboy
02-24-2009, 09:28 PM
GRASS :D

Just the usual, small weeds and grass.

Green Up
02-24-2009, 09:40 PM
There is several maker for the active ingred. Glysophate. Round up, Eraser, Corbnerstone just to name a few.

Runner
02-24-2009, 10:29 PM
All you will have to do is mist over the top of the 2500 sq ft. I use a back pack and spray crack in side walks, flower beds, around building and etc. Can you tell me more about what you are trying to get rid of?

Yes, but how much do I put in my tank? And I only want to make enough to do this area...

It is a combination of grass, weeds, and I even have some of this viney looking stuff. It grows out of the ground, and then back in. I also have this stuff that has waxy leaves - that are sort of spade shaped. Will this die too, with the same mix for the grass? Also, how long will it last? Will I be able to grow grass there?

JB1
02-24-2009, 11:18 PM
So how much of this glu-phosphate stuff do I need to mix in my backpack if I need to do an area 50'x50' (2500 sq. ft)?


at least 2 glugs out of the jug.

Grassmechanic
02-25-2009, 12:24 PM
This is one of the more entertaining threads I've read in awhile.

a plus bob
02-25-2009, 01:07 PM
at least 2 glugs out of the jug.

2 GLUGS AND A SPLASH FOR THE HIGH RATE:laugh::laugh:

starry night
02-25-2009, 01:20 PM
This thread is hilarious and pitiful at the same time.

LouisianaLawnboy
02-25-2009, 01:22 PM
Wow just asked about how much RoundUp to put. LOOK at all the topic we have covered.

tlg
02-25-2009, 03:03 PM
This thread is hilarious and pitiful at the same time.

Wow! I just got the strength to get up off the floor so I could post. No.. No here I go again the 2 glugs got me...:dizzy::dizzy::dizzy::dizzy::dizzy:

treegal1
02-25-2009, 03:40 PM
at least 2 glugs out of the jug.
bartender another round, make it a double.:laugh::laugh:

LouisianaLawnboy
02-25-2009, 07:34 PM
Wow! I just got the strength to get up off the floor so I could post. No.. No here I go again the 2 glugs got me...:dizzy::dizzy::dizzy::dizzy::dizzy:

WHAT? Thats not right. I actually had to use that method today. I didn't have any measuring cup and it was the customers RoundUp.

Though, I think 4 quick glugs are more effective than 2 full ones. JMO:laugh::laugh::laugh:

triadncman
05-17-2009, 04:44 PM
Round up Red (41%) says 3oz per gallon right on the label if you want the strongest mixture. The stuff I use says 2.5 oz per gallon. Mix it by the label and do not spray it on anything you don't want to kill. Don't spray in windy conditions. Don't drink the stuff. I know what the state laws say but a person shouldn't need a license to handle that.

I can understand licensing for applying the serious stuff but a person shouldn't have to have a license to spray round up in some beds when the average homeowner can go to Home Depot and buy the stuff and take it home and spray it. Its stupid!! just another way for the state to get in our pockets.

JB1
05-17-2009, 05:31 PM
Round up Red (41%) says 3oz per gallon right on the label if you want the strongest mixture. The stuff I use says 2.5 oz per gallon. Mix it by the label and do not spray it on anything you don't want to kill. Don't spray in windy conditions. Don't drink the stuff. I know what the state laws say but a person shouldn't need a license to handle that.

I can understand licensing for applying the serious stuff but a person shouldn't have to have a license to spray round up in some beds when the average homeowner can go to Home Depot and buy the stuff and take it home and spray it. Its stupid!! just another way for the state to get in our pockets.


what do you mean the serious stuff, it will kill whatever you spray, now if that ain't serious.

LouisianaLawnboy
05-17-2009, 06:05 PM
I'm licensed. Better to get a license now, than a fine and a license later.

lostyankee
09-05-2013, 02:07 PM
A lot of you have been pretty hard on LouisianaLawnBoy, but have provided little in calculating the answer he is looking for. I will be spraying Cogon Grass this weekend. An in-depth study has recommended 1% glysphosate solution. It took me some time to figure that 100% solution of glysphosate mixed at 6 oz per 128 oz water would be 2.3475% So with 41% being the concentration normally sold 2.3475 x .41 gave me .9609% which is the ideal 1% the study called for to kill the plant and rhizomes. So I am going to be using 3 cups per 4 gallon backpack sprayer this weekend. Not easy even for this old Computer Scientist to figure out.

Florida Gardener
09-05-2013, 02:15 PM
2 oz pg will knock out 95% of weed here. No need to use more unless it is a tough to kill weed.

lostyankee
09-05-2013, 04:53 PM
To get to 1% glyphosate concentrate using 41%. 3oz/128oz x .41 = .9609 %

jada86
09-05-2013, 05:20 PM
Use Hi-Yield - same effectiveness, we use 3 ounces/gal. If you can't find it locally, look here:

http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=110718757937&item=110718757937&lgeo=1&vectorid=229466

lostyankee
09-05-2013, 05:26 PM
Good info Cara, thanks for verifying my calculations at 3oz per gallon. Randy

lostyankee
09-05-2013, 05:30 PM
This is a good article done where Cogongrass originated.

http://www.pomics.com/lu_5_2_2012_177_183.pdf

FdLLawnMan
09-05-2013, 05:45 PM
This thread is 4.5 years old. I would bet most of the guys that originally posted are no longer on this site.

FL-lawnjockey
09-07-2013, 10:48 AM
http://i1126.photobucket.com/albums/l613/groundsclown/index.jpg (http://s1126.photobucket.com/user/groundsclown/media/index.jpg.html)
http://i1126.photobucket.com/albums/l613/groundsclown/index1.jpg (http://s1126.photobucket.com/user/groundsclown/media/index1.jpg.html)