Small batch mixing for glyphosate herbicide ....

Crazy Horse · May 17, 2018

Before I start this post, I do not have a big field tank sprayer (with spray rate adjustments) nor am I
spraying hectares (or acres) of land. I have some Monsanto RT540 concentrate and reading through the
mixing instructions, I realize there are countless variables involved (like plant type, growth stage, etc)
and they always seem to relate to field spraying, etc.

What I'm looking at is what YT'ers have experience with for glyphosate mixing ratios for general/typical
use in small yards use using a small pump mist sprayer for small areas. So, something like fluid ounces
of herbicide mixed in fluid ounces of water works for me, or millilitres of herbicide to litres of water,
or even a simple percent, ratio, or fraction. Using terms like pints, quarts, gallons can be messy since
US and Imperial liquid volumes are different.

Anyways, I'm just curious what some of us here might use in such situations. Thanks for the info .....

JWA · May 17, 2018

I use 1 to 1 1/2 ounces per gallon. It has worked for me for many years for general use.

casecollectorsc · May 17, 2018

We use a quart of gly per acre mixed in 10 gallons of water per acre. Also add 1 pound of AMS per acre to make the product stick to the plants. Have heard of using Dawn dish soap as the adhering agent.

jm. · May 17, 2018

General yard spraying anything from 1 1/2 once to 2 ounces per gallon of water works well.

Crazy Horse · May 17, 2018

So US or Imperial measures? Thanks.

Crazy Horse · May 17, 2018

So, US or Imperial measures? Thanks ....

rustyfarmall · May 17, 2018

(quoted from post at 05:22:59 05/17/18) Before I start this post, I do not have a big field tank sprayer (with spray rate adjustments) nor am I
spraying hectares (or acres) of land. I have some Monsanto RT540 concentrate and reading through the
mixing instructions, I realize there are countless variables involved (like plant type, growth stage, etc)
and they always seem to relate to field spraying, etc.

What I'm looking at is what YT'ers have experience with for glyphosate mixing ratios for general/typical
use in small yards use using a small pump mist sprayer for small areas. So, something like fluid ounces
of herbicide mixed in fluid ounces of water works for me, or millilitres of herbicide to litres of water,
or even a simple percent, ratio, or fraction. Using terms like pints, quarts, gallons can be messy since
US and Imperial liquid volumes are different.

Anyways, I'm just curious what some of us here might use in such situations. Thanks for the info .....

I have a 2 1/2 gallon garden sprayer. I pour in just enough glyphosate to fill the indentations in the bottom, and then fill with water. Been doing it that way for many years now. The weeds and grass die, with no ill effects.

steve706 · May 17, 2018

I use 1.33 litres of RU to 40 litres water for burn down, and .67L to 40L for regular control.

CBBC · May 17, 2018

I don't like the gallon / oz measurement either... I've pretty much converted myself to metric.

And actually in a backpack I will often mix as a percent anyway. You're never as accurate and consistent anyway compared to driving a tractor in a set gear and rpm.

For around the yard, the original RU we used to get I would mix it at 2%, 200mL : 10L. The Weather Max I get now I usually mix at 1% - 1.5% ( 100-150mL : 10L water) depending on conditions and what weeds we want to kill.

But the big question is what is the amount of the actual chemical Glyphosate / Litre. I don't know what that formulation you are using is and how it compares to the Weathermax I get in the 10L jugs.

Good luck, be safe

grizz02 · May 17, 2018

I use 2to 3 oz per gal

Butch(OH) · May 17, 2018

2 oz per gallon is what I use. get a measuring cup, you be surprised how much material you save over guessing.

Crazy Horse · May 17, 2018

CBBC ....... The product info with this Monsanto RT540 says "Glyphosate 540 grams acid equivalent per litre, present as potassium salt" ....... it's probably some kind of an industry standard for stating what's in the container for strength of the concentrate. This came from a 10L jug as well.

jddrawbar · May 17, 2018

A good solid 1 ounce per gal. will work...put some surfactant with it and you will be good to go.

Crazy Horse · May 17, 2018

Drawbar ........... So, something like a bit of liquid soap (like someone else mentioned) or are you referring to a for-sale product from a store? If soap, like a teaspoon in a gallon of herbicide? Just guessing here with this question.

VicS · May 17, 2018

USA. Measure 1 quart to 10 gal water. Nothing else spraying around farm. For field burndown. 1 qt. Roundup power max. 1 pint 2-4-D 3 oz canopy. Per acre in 10 gal water.

Russ from MN · May 17, 2018

41% Glyphosate? I mix it about 2oz per US gallon.

JL Ray · May 17, 2018

I don't remember what the ratios are but when I do the hand spray thing, I normally mix it about twice what it should be since I'm hand carrying the hand pump sprayer and I don't want to do it twice.

JMOR · May 17, 2018

Russ, of all these 'answers', look like you are the only one to recognize that these products come in differing percentages. RT540 label shows 49% where Roundup will be 41% except where labeled otherwise for homeowner use, where is will be less concentrated. User should look up MSDA for the product. It gives mixtures for many applications and included his 'tank mix for hand/spot treatment".

Two Dogs · May 17, 2018

FWIW I use three ounces per gallon. TDF

Mike(NEOhio) · May 17, 2018

2 to 3 per gallon here, too, with 41%.

jddrawbar · May 17, 2018

It's more efficient to use the store bought concentrated surfactant. You can find it at TSC or most feed stores selling chemicals. It only takes about half ounce per gal. of the good stuff. On hard to kill varieties, I also use a penetrate (prickly pear, waxy leafed brush, etc.)

JD Dave · May 17, 2018

For sure-fire results I use 2% Roundup or generic with equal percentage of active ingredient. This mixture will burn down and kill almost everything as long as the weed is totally wet with the mix and is rain-free for 4 hours. For best results on perennial weeds and nutsedge spray them in late summer or early fall, maybe twice, as the weed will take up more of the Roundup and translocate it to the roots.

casecollectorsc · May 17, 2018

US...

CBBC · May 18, 2018

Someone said RT540 IS 49%, and i think i was using 42%.
I would mix it at the 1 - 1.5% rate. Back pack spraying is usually fairly inprecise... sometime you need to repeat in a few weeks. And for tough perrenials like blackberry, sedges and morning glory etc, spraying in the fall works best for a complete kill.

Small batch mixing for glyphosate herbicide ....

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