RE: Round up
 

what's the dish washing liquid for gregrn?

RE: Round up
 

If you are using 41% Glyphosate, you need 6.24 ounces per 1 gal. to get a 2% concentration

Gmil6184, If you can not find 41% Gly at your local co-op or feed store for less than $41.95 per gal. or $86.95 for 2.5 gallons, here is a site http://www.keystonepestsolutions.com/index.php?main_page=index&cPath=9

RE: Round up
 

What makes namebrand roundup better than the generic glyphosate's is it has a very good surfactant in it. Adding dishwashingacts as a surfactant in thegeneric glyphosate. It makes it stick to the plants better for a better kill.

RE: Round up
 

Thanks for the help haystack and gregrn, going generic and using a little dishwashing soap sounds like the trick

RE: Round up
 

gmil6184 Some of the generic Glyphosates do have a surfactant, such as Strikeout Extra and it will work as is. But additional surfactants/adjuvants will help aid the Gly and shorten kill time. Dishwashing soap can be and is used, however Gly is somewhat sudsy/foamy and I prefer to use AMS (Ammonium Sulfate) its a form of nitrogen and works well. I use a tank sprayer and add 4lbs of AMS per 25 gallons. In your case, it would take aproximately 5ozs in 2 gallons of water, along with Gly.

I use quite a bit of Gly+AMS and see results fairly quikly, at 2 qts per acre. A lot depends on the weather though.

Here's a few pics of a Gly+AMS "Burndown"

This field was sprayed on 5/11/09, and you can see some signs of dieing already.


And here's what it looks like 8 days later, only a few tuff weeds still have a bit of green showing, but they will be history by next week.




Be sure to read and follow the label/MSDS. Used corectly it's hard to beat in fields and food plots.

RE: Round up
 

I know I'm no math wizard, but that's not correct.;)That would be closer to a 5.5% solution.

RE: Round up
 

I'm certainly no math wizard either, I must rely on a calculator. And actually your 5.5% is incorrect, it should be 4.88%;)

I converted a 41% concentrate to 100% 128ozs = 1 gal.......128 x 0.02 / 0.41 = 0.0624

We was talking about a HH-HV sprayer or hand held/ high volume. The above concentrate is for HH-HV only, big difference between that and a CDA/ Controlled Droplet Application sprayer, which is much easier to apply 2 quarts per acre precisely.

On page 41 of a Gly4 pamplet it recommends a 5% solution for Annual and Perennial weeds when using a HH and why. The 6.24 concentrate is actually less than what is recommended, if you was thinking that I mixed to hot.

RE: Round up
 

My farmer friend told me he used one gallon to 100 gallons of water and he farms a few thousand acres of corn and soybeans. That comes out to 1.28 onces per gallon, I use one ounce to a gallon and that works for me.

RE: Round up
 

For a fall plot, you usually do not need to spray. When were you thinking about planting and what were you going to put in it?

RE: Round up
 

The 5.5 was just a guess, and I wasn't saying thatyou were absolutelywrong about the mixture,just that 6.24 oz. per gallon wasn't a 2% mix of 41% gly. If there's one thing I've found, it's that you don't have to be absolutely precice when trying to nuke everything. Coalcracker is only using 1 oz/gal and having success, which is much less that I would have thought to try.
I think that may depend on where you're from. Around here grasses like fescue, orchard grass, rye grass, and timothy will take over in no time.