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Discussion Starter · #1 ·
If I add Centurion to my Liberty for wild oats, am I getting any herbicide rotation away from group 1? Will straight liberty kill them?
 

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Well, the Liberty label doesn't list wild oats, but it does list other grasses: volunteer wheat and barley, quackgrass, green foxtail, barnyard grass. For the volunteer wheat and barley, it says top growth control only. I would think it might burn the leaves off, but the wild oats would likely re-grow.

On our farm, I have been wondering if we should be seperating the Centurion and Liberty apps myself. The Liberty smokes the leaves of the grasses which makes me wonder how much centurion is actually making it into the weeds? Maybe we should be going in with 20ac/case or 40 ac/case Centurion and then 5-7 days later, hit with Liberty. We've only done this so far on fields where the grasses are coming in much faster than the broadleafs.

Andrew
 

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Discussion Starter · #5 ·
Andrew, the label says wild oats at 1.35 litre rate but does that mean anything in the real world? And if we always have to mix Centurion with Liberty then I am wondering if I want to be using up a goup 1 option in my canola or if it is primarily the liberty that is doing the killing and the centurion only gets the escapes...
 

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Liberty fries the leaves off before the Centurion has time to work.
Maybe that's what happened to mine a few years ago. Reps summer student never gave me a answer, just a free box of centurion after swathing to close her case off. She said that they were very busy with claims that year. Tested my water, told me I should have sprayed it when warmer, mixed it wrong and every other excuse she could come up with. But nothing I did was wrong. Just didn't work right. RR canola now.
 

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I always use 80-100 acres per case centurion with liberty and have excellent controls or wild oats and good results. If it's thick. Not a bad idea to do just centurion first.
 

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Andrew, the label says wild oats at 1.35 litre rate but does that mean anything in the real world? And if we always have to mix Centurion with Liberty then I am wondering if I want to be using up a goup 1 option in my canola or if it is primarily the liberty that is doing the killing and the centurion only gets the escapes...
Had to go back and look again. Yes, you are right. It lists wild oats after quackgrass and I missed it!

Still thinking we should be splitting the 2 chemicals, but don't always have time for it.

Some quick math: Currently paying $9.30/ac for 1.35L/ac Liberty (that's $6.89/L) and $2.40/ac for 80ac/case Centurion. So that's $11.70/ac total. If the centurion efficacy is questionable, why not spray Liberty at the 1.6L/ac rate for a total of $11.02 and be money (and hopefully control) ahead???

Andrew
 

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Discussion Starter · #9 ·
Had to go back and look again. Yes, you are right. It lists wild oats after quackgrass and I missed it!

Still thinking we should be splitting the 2 chemicals, but don't always have time for it.

Some quick math: Currently paying $9.30/ac for 1.35L/ac Liberty (that's $6.89/L) and $2.40/ac for 80ac/case Centurion. So that's $11.70/ac total. If the centurion efficacy is questionable, why not spray Liberty at the 1.6L/ac rate for a total of $11.02 and be money (and hopefully control) ahead???

Andrew
yes I've wondered that too but worried about the efficacy of Liberty without a tankmix
 

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I had some invigor 252 this year on some high yielding oat stubble. Some patches of volunteer and wild oats. I just mixed up a tank of straight centurion and sprayed the patches. About 8 days later, sprayed my regular liberty/ centurion mixture. I think for next year I'll do the same thing to where the wild oats are thicker.
 

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We're just two passing the liberty 1.6+1.35 and leaving the centurion in the box. 16gal water both times at 90psi. Saves the group 1
 

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We're just two passing the liberty 1.6+1.35 and leaving the centurion in the box. 16gal water both times at 90psi. Saves the group 1
I too have separated the Centurion from the Liberty by 4 or more days, works well, but time consuming. It has a good fit where the weather isn't conducive for Liberty, but the grasses are taking off.

My second pass last year I bumped the water rate up to 12us gal through my 10's and it worked a lot better, even under less than ideal conditions. Liberty almost works like Reglone in that the finer the mist, the better the efficacy is seems.
 

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You can kill the wild oats without the group 1 centurion. I do it every year. The way to do it is make sure you do a preseed glyphosate burnoff. Then spray the liberty at the 1.35 litre rate but you have to do it when the wild oats are no bigger than 3 leaf. This means doing this 1st pass when the field still looks black from the road. Liberty will kill these young wild oats but once they get their 1st tiller right after the 3rd leaf its unlikely. then 10 days after the 1st pass with liberty hit them again with another 1.35 litres. After this 2nd application the crop competition takes care of the rest. This has always worked for me. I agree with you - this is really your only chance to kill them with a group 10. Makes sense to me!
 
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