How Long to Allow Glysophate Burn Down Before Planting?

Fergienewbee · May 8, 2014

I have a small plot that layed fallow last year and has a lot of quack grass. If I spray with RU or Arrow how long should I give it to die before plowing? My other option, is to plow and plat RU corn. It's a small plot so wouldn't take too much seed. I'll use my tractor for the spraying and planting.

Larry

donjr · May 8, 2014

About a week or two before planting will be more than enough. If you use (if you can get it) Gramoxone, you'll only need a couple of days before it's dead. But, the Roundup or a generic like Touchdown, and you'll be good to go in about a week or so. If you're putting corn in, why not no-til it?

big jt · May 8, 2014

If you are gonna plow why bother with Roundup?

Glyphosate only kills what is growing and if you are gonna turn it under either the plowing or the roundup is a waste of time and money.

If you don't plow you can plant right behind the sprayer.

jt

mkirsch · May 8, 2014

It used to be three days but now I think you can spray it and turn it right under.

The whole point to spraying before you plow is to keep the stuff from coming back. You can't do a perfect job of plowing, and some of the sods will end up green-side up after you run the disk over it. Anything green-side-up will take root and grow.

Ron Anderson · May 8, 2014

I have never seen plowing kill quackgrass. I have been farming for many years and about the only way to kill it before chemicals was devoting a solid summer to till that patch continuously until it quit coming up. It has a extensive root system which will survive plowing. Look at how it spreads from the roots being dragged along from a implement.

paul · May 8, 2014

7 days.

Little longer if you are cool - like the pic Allan has of the snow on the ground...

Roundup needs to move down the plant to the bottom of the roots, and starts killing from the bottom back up to the top.

If you spray it and work it right away, very little gets down into the base of the root of a big rooted weed.

Then you wasted the spray, plus still have the weeds that come back from the root.

Roundup takes time. It os slow acting.

Paul

Fergienewbee · May 8, 2014

Don;

I don't have a no-till planter. I just have two 71s on a tool bar. Plus I need to add fertilizer. I could also let the RU work for a while and plant cowpeas, then follow that with crimson clover in the fall and corn the next year. I have six or seven plots that I try to rotate and improve the soil. It's been at least 40 years since anyone turned the ground over.

Larry

Nancy Howell · May 8, 2014

Since there are different strengths of glyphosate (RU) available, you should check the label of the product you plan to use. It should say how long to wait.

The glyphosate has to have time to move from the foliage to the roots in order to kill the plant.

RodinNS · May 8, 2014

3 days and spray at a higher rate. 1.5-2L/Ac of RU original...

Rod

wilamayb · May 8, 2014

There is not a perfect time answer to your question. Most of it depends on ambient and soil leading up to, and following the application as well as the rate used.

Refer to your product lablel. If it is warm enough 48 hours will get the job done if using the proper rate. The deal is that the plant has to be active enough to take the product to the root.

GordoSD · May 8, 2014

Plow it . Disk it.wait a week and then plant it with ruready corn. Then spray it when you see the grass growing in the corn plants.

tomNE · May 8, 2014

big JT is the only correct answer! I'm still trying to figure out what the rest of you are talking about!

Dean Olson · May 8, 2014

I've no experience with Quack grass. But if it's any thing like common Bermuda grass, plowing won't kill it. It just breaks it up and creates more plants.

I spray and wait for everything to be completely brown. May need a second treatment. Then I'll turn it under. It takes several seasons and multiple sprayings to get rid of it.

RodinNS · May 8, 2014

Perhaps you should try reading the product label a little more carefully...

gene bender · May 9, 2014

I would plow it then pant my crop you can always spray later if needed. There are always seeds that are waiting to grow having been there for yrs.

rrlund · May 9, 2014

As warm as it is right now,give it four or five days Larry.

How Long to Allow Glysophate Burn Down Before Planting?

Fergienewbee

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donjr

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big jt

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mkirsch

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Ron Anderson

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paul

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Fergienewbee

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Nancy Howell

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RodinNS

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wilamayb

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GordoSD

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tomNE

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Dean Olson

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RodinNS

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gene bender

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rrlund

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