Spraying roundup on beans

I've never used rounup on beans before, do you folks mix anything with it for beans? I know for corn you add a bit of nitrogen and adjuvant, but do you do that for beans too?

Depends on what weeds and how big they are

First, the Soybeans have to be "Roundup Ready."
Second, it's recommended to add Ammonium Sulphate to the tank especially with very hard water.

Some weeds are getting resistant to roundup.Depends on the type of weeds you have.

The field was 40+ year old sod so there will be quack, crab, timothy and other grass, some alfalfa and clover and maybe some thistle, lambs quarters is everywhere here as well. I'm not looking for additional herbicide, just if some additives need to mixed with to make the roundup work better. I figure to spray twice anyway because of the sod. I tried to look it up online, but most of the results just went to the controversies surrounding roundup. I'll ask my supplier too, but I thought some of you that use it might also have advice.

use the full rate that is for beans and you will like the job it does

There is a liquid product called Optima that can be used in place of AMS. For me it's easier using Optima than lugging around bags of AMS, but each has it's advantages. Optima is added at the rate of 5oz per acre so for me it's costing $2.90/A for Optima. That cost will vary of course. Get those weeds when they are small when you use Roundup, 2" or maybe a little bigger but if the waterhemp gets any bigger than that you might not get the resistant ones. I have 80 acres I planted without a preplant residual. I have sprayed them with Roundup (32 oz/$6.75 per Acre each time) twice already. First time I sprayed the temperature was around 60 which is a little cool for the weeds to be active, but rain was in the forecast (imagine that!) I killed some and made the rest mighty sick but they never did die, just stayed yellow. A couple of days ago I sprayed them again because the new flush of weeds was coming on strong and they were in the 2" stage. Temp was in the high 80's, perfect temp. This is a field that has some resistant waterhemp from me letting the weeds get too big before I sprayed them in the past. The rest of my beans have Authority First sprayed preplant during burndown and those beans are mostly clean except for where it drowned out last year. Now I'm kicking myself for not taking the hour and a half to spray a Roundup burndown with a residual like Authority before I planted.

We can't procrastinate and wait till every weed has come up to spray. The taller ones will be too mature. It's a new ballgame now that weeds are learning how to survive Roundup. There is an old post emerge herbicide called 'corn knife', the kind you swing with your hand and arm but I don't want to go back to those days. LOL

Edit, just read our second post about it being former sod for 40 years. You won't have to worry about resistant weeds this time. Roundup will do a good job of burning the volunteer grass at 32 oz/A

You are best off calling the Coop. I have a different cocktail for each piece of ground as it seems they each have their own needs. I hate putting something like Cobra on with it because it tends to ding the beans pretty good, but you can't go to the elevator and sell a load of weeds at harvest so you have to do that sometimes. I had the coop out this morning to see if the field by the house would burn down with some Sharpen in it. The mares tail is getting borderline big. I'm on my way to town for atrazine now so I will see what he says.

I use a product called Request. It softens the water and helps it stick to the leafs of what your spraying. There are allot of different versions that do the same thing depending upon your supplier. I'm assuming you have roundup ready beans your spraying.

Generally yes you should add a surfactant to "Roundup" [glyphosate], talk to your supplier or an agronomist, there are more additives than you can keep track of, they all work in a similar fashion. Mike

I use glypho and ams. I put some foliar fert in sometimes like versamax or whatever your local sells for beans. It helps the weeds take that glypho in too. Normally though, I feel like I'd take that money spent on foliar fert and put it in my dry program. My 2 cents.