2,4-D dilution?

[Lycanthrope]

Ive done a little searching and not finding a good answer. I want to use this chemical in a backsprayer to spot treat for broadleaf weeds. Trying to find a good dilution rate that will effectively kill weeds without torching grass. Ive found recommendations from as low as 4ml/gallon up to 30ml/gallon. This will be sprayed on weeds to saturation, not a light misting... Instructions on the product only show amount to use/area which doesnt help me much. If you cant read the label, its 86.5% 2,4-D.

 

[Tikka280ai]

1oz/gallon of water is what I have always used for spot treatment. Unless I want to make sure it's dead. Then it's a slosh and gurgle or 2

 

[Bfishn]

Yeah think I used to use like 2 tablespoons per gallon, but now I just pour a little in and go. I know I mix it hotter than its supposed to be, but have never killed any grass, it might just turn the immediate area a bit yellow for a few days while its killing the weed.

 

[Kentucky Windage]

Backpack sprayers are just about impossible to get the proper rate down. Product, speed, and pressure all need to be perfect to get the right rate down. I’ve never measured. I look up the rate per acre and add what I think I need to the sprayer.

 

[SDMF]

Yeah think I used to use like 2 tablespoons per gallon

Buddy had some concentrate and I mixed up a gallon for spot treatment last weekend. 2oz/Gal measured out in the concentrate cap then dumped into the 1Gal sprayer. Weeds were "melting" 24hrs later.

 

[NDwalleyes]

This is about how I mix it. 1oz per gallon in the sprayer for the yard. If I'm killing wormwood or canada thistle and heavy stuff, I'll certainly be at 2oz/gal.

24D is pretty safe.

1oz/gallon of water is what I have always used for spot treatment. Unless I want to make sure it's dead. Then it's a slosh and gurgle or 2

 

[db-2]

Like they say. Round up or whatever i work with 2% solution. 1 to 2 ounce per gallon works find. 2 ounce will get quicker kills, but 1 ounce will kill in time. db





1 gal i believe is 8 pints at 16 ounce per pint is 128 at 2% is a little over 2 ounce per gal. I use Trimec 992 that i get from local ag store. Works great. Sprayed on weeds yesterday and next day they were showing signs of moving on to the next life.

 

[FlatTopPete]

2,4-D is usually applied anywhere between 6-10 fluid oz per acre on farm fields. Backpack sprayer is going to be incredibly hard to get any sort of proper rate down.

Best to use one of those dandelion lawn roller things. With that being said, if you’re going to spot spray some weeds in your lawn, plan on seeing some yellowing of the grass but it shouldn’t kill it. Will green back up over time unless you absolutely torch it with 2,4-D

So, taking all of the above into account, and figuring you’re using a 2 gallon backpack sprayer, I’d dump 2-4 oz in and you should be good depending on what weed you’re going after.

 

[johnr]

Hotter does not always produce a better/quicker result.

 

[db-2]

Johnr:

Yes, to strong kills the leaf before it gets into the roots. db

 

[Lycanthrope]

So I have some consumer strength 2,4-d, spectricide brand which gives dilution rates for spot treating and it recommends about 6oz/gallon, but its only around 3% 2,4-d in the concentrated form. It also has some other ingredients... Anyway I crunched the numbers and to make the same strength solution of this stronger form, I would need 6.4ml/gallon of spray. So if I did 1oz/gallon as many seem to be recommending, it would be 4-5x as strong as the recommended rate of the consumer version. Not saying thats bad necessarily, just pointing it out.

 

[tikkalover]

I use Trimec at 3-4oz. per gallon of water and have 0 issues.

 

[KDM]

If protecting grass is the major goal, a GREAT rule of thumb is go lighter, spray, and see what happens. Some broadleaf weeds are more susceptible than others. You may get total kill with 1/2 oz per gallon or less and the grass may be untouched. If there are some weeds that hang on, you can always hit'em again with a spray bottle of solution instead of using the backpack. Happy Hunting!!!

 

[watson]

2 oz/gallon will take care of any weed

 

[NDwalleyes]

Damn it Lycan! This is man stuff! We don't care how they say to mix lawn chemicals it in the latest issue of Metro-Sexual Magazine. Man Code says 24D is always 1-2 oz/gal. ;:;rofl

So I have some consumer strength 2,4-d, spectricide brand which gives dilution rates for spot treating and it recommends about 6oz/gallon, but its only around 3% 2,4-d in the concentrated form. It also has some other ingredients... Anyway I crunched the numbers and to make the same strength solution of this stronger form, I would need 6.4ml/gallon of spray. So if I did 1oz/gallon as many seem to be recommending, it would be 4-5x as strong as the recommended rate of the consumer version. Not saying thats bad necessarily, just pointing it out.

 

[Allen]

I use a 2.5 gallon backpack sprayer and generally put in 3/4 cup (6 ounces) of the higher concentration ag formulation of 2-4D. It tends to kill whatever I want gone. The harder things to kill, like thistles, absinthe wormwood, and baby's breath get some help from either tordon or MSM. Importantly, seasonal development of some weeds (leafy spurge, thistles and dandelions in particular) make them hard to kill this time of year. They are best sprayed early on in the year for thistle, and early fall for dandelions and leafy spurge. Also, I recommend not spraying in the heat of the afternoon as the stuff can/will evaporate and be carried downwind more than you may wish. Especially important if you're spraying anywhere near juneberries or small fruit trees.

 

[NDbowman]

You have LV6 which is more concentrated than LV4 so you will need less LV6 than LV4. What you have is 24D ester, which has a quicker burn down. I use LV4 for spraying brush and like to mix it with tordon to kill trees in ditches and such.
I think for spraying in town you'd prefer 24D amine. A little slower kill but will still have weeds curling up a few hours after spraying. Maybe a little less volatile than LV6.
Your county agent would have a chart for mixing small amounts, might even be in the label on the jug.

- - - Updated - - -

Calibrating and using a backpack sprayer (ndsu.edu)

NDSU on backpack sprayer. scroll down to the calibration part, little long winded but you'll eventually figure out how much to add. In short they want you to figure out how much area you'll cover while spraying to know specifically how much chemical to add.

In my atv sprayer I've never really calibrated it like this, my atv sprayer holds 25 gallons and I know I'm not spraying an acre with it but I add half the amount of chemical I would be spraying out of my big boom sprayer per acre. So if my big sprayer is doing 10 gpa and I'm applying a quart of chemical per acre, then in my atv sprayer I'd put a pint in for every 10 gal of water. Yes I know thats a little strong but I want a good kill on spurge, wormwood, or whatever else I'm spraying.

Im going to assume your backpack sprayer is 2 or 3 gal. My math would take .8 of an ounce of LV6 per gallon, and that might be strong, maybe an ounce to and ounce and a half in 2 gal.

I can't imagine having a backpack full of that stinky shit on my back.

 

[1bigfokker]

Don't use ester it will be volatile in this heat and kill lots of stuff you hadn't planned on killing.

 

[Allen]

I can't imagine having a backpack full of that stinky shit on my back.

It sucks when you get a whiff of it. Then again, I think you already knew that.

 

[mikef]

Don't use ester it will be volatile in this heat and kill lots of stuff you hadn't planned on killing.

you’ll get much better absorption and kill also if you can spray early in morning or when it’s not so hot