Poa control in bermuda Cancel The title field is required!

1. Joshua Sawyer

   

   0 posts
   
   2/25/2016 8:02 AM

   OK guys...this is soliciting info on what you are doing. In South Carolina upstate, bermudagrass fairways, roughs, etc. I am relatively clean from Poa this year, so I have decided to skip wall to wall glyphosate app that is typically tank mixed with Ronstar flo. This app is a little late because of the excess wet weather hampering the sprayer, so...
   
   Where we are spot spraying isolated, established clumps of Poa, we have used a wick adjacent to greens with Glyphosate several times through. This is killing some plants and not others. Could be application through the wick, but there is also a lot of talk about Glyphosate resistant Poa in the area.
   
   We have also sprayed Revolver at 9 oz/A (low rate) over areas away from the green, but it doesn't seem to be taking out the Poa...a little yellowing so far. We are also back packing some Finale, but anticipate a delayed green up, so I am trying to limit this application.
   
   As we are rapidly approaching green up, we are racing to finish the Ronstar Flo app. I am thinking that I will have to go back out with Revolver again (where safely away from Bentgrass greens), probably at higher rates. Any thoughts?

   
   
   
   
2. Andy Jorgensen

   

   1 posts
   
   2/25/2016 8:02 AM

   I would use Kerb to finish up where you can. But prior to spraying, give Dr. Jim Brosnan a shout at UT. He can diagnose if you are sulfonylurea or Glyphosate resistant. He helped me out last year when we had issues killing clumpy Poa. Diagnosed and gave a few recommendations that so far this year is working just fine. He provides a full report that you can also show the higher ups. A great wealth of knowledge.
   
   jbrosnan@utk.edu

   
   
   
   
3. Joshua Sawyer

   

   0 posts
   
   2/25/2016 8:02 AM

   Should I expect green up issues with Kerb? Been a long time, but seems like there is a lot of movement within the soil?
   
   Thanks.

   
   
   
   
4. Cecil Daniel

   

   0 posts
   
   2/25/2016 9:02 AM

   Joshua Kerb will defiantly move in the soil. I have found that it also didn't control larger poa that is putting out seed heads. It works great earlier in the year and on smaller plants. We did our roughs with Diquat, and that worked well earlier as well. As the plants have gotten larger, the Diquat only injures the poa. With poa beginning to rebound and green up starting, I have been exploring other options. We have als resistance issues.
   
   Andy I have read previous posts and know that you are a fan of sencor. How is it on poa? How long does it take to work? I tried a spot spray mix of 1 oz sencor in a 25 gal tank approx 15000 ft2. We are starting to green up and I don't want to look like a Dalmatian. I think this rate is a little low but I am trying to be cautious. Any thoughts
   
   Thanks

   
   
   
   
5. Andy Jorgensen

   

   1 posts
   
   2/25/2016 1:02 PM

   Cecil K Daniel said: Joshua Kerb will defiantly move in the soil. I have found that it also didn't control larger poa that is putting out seed heads. It works great earlier in the year and on smaller plants. We did our roughs with Diquat, and that worked well earlier as well. As the plants have gotten larger, the Diquat only injures the poa. With poa beginning to rebound and green up starting, I have been exploring other options. We have als resistance issues.
   
   Andy I have read previous posts and know that you are a fan of sencor. How is it on poa? How long does it take to work? I tried a spot spray mix of 1 oz sencor in a 25 gal tank approx 15000 ft2. We are starting to green up and I don't want to look like a Dalmatian. I think this rate is a little low but I am trying to be cautious. Any thoughts
   
   Thanks

   
   
   
   Yes, Kerb will move. I've sprayed it on greening Bermuda and watered in right away with no issues.
   
   Sencor...one of the best herbicides on the market...however, I would avoid it this time of the year.

   
   
   
   
6. Justin Murray

   

   0 posts
   
   2/26/2016 6:02 AM

   Andy Jorgensen said:
   
   Sencor...one of the best herbicides on the market...however, I would avoid it this time of the year.

   
   
   Why? I am asking because we are planning on spraying some next week for poa. The trial areas we used the sencor it knocked the bermuda back a little but we had some cool weather since. It was about 5 weeks ago. I can live with a little dinged up bermuda!

   
   
   
   
7. Andy Jorgensen

   

   1 posts
   
   2/26/2016 10:02 AM

   Justin Murray said:

   Andy Jorgensen said:
   
   Sencor...one of the best herbicides on the market...however, I would avoid it this time of the year.

   
   
   Why? I am asking because we are planning on spraying some next week for poa. The trial areas we used the sencor it knocked the bermuda back a little but we had some cool weather since. It was about 5 weeks ago. I can live with a little dinged up bermuda!

   
   
   Only time I have used Sencor for Poa was at, I believe, the 6oz/ac rate and we watered in immediately. These spots were very slow to green up, and were about a month behind everything else. It probably didn't help that it was on fairway height turf that was just breaking dormancy, and really the spots looked like the remainder of the rough at the time. Nobody probably even noticed but me. In hindsight, I should have sprayed the entire fairway instead of spot treating where just the Poa was.

   
   
   
   
8. Justin Murray

   

   0 posts
   
   2/27/2016 6:02 AM

   Andy Jorgensen said:

   Justin Murray said:

   Andy Jorgensen said:
   
   Sencor...one of the best herbicides on the market...however, I would avoid it this time of the year.

   
   
   Why? I am asking because we are planning on spraying some next week for poa. The trial areas we used the sencor it knocked the bermuda back a little but we had some cool weather since. It was about 5 weeks ago. I can live with a little dinged up bermuda!

   
   
   Only time I have used Sencor for Poa was at, I believe, the 6oz/ac rate and we watered in immediately. These spots were very slow to green up, and were about a month behind everything else. It probably didn't help that it was on fairway height turf that was just breaking dormancy, and really the spots looked like the remainder of the rough at the time. Nobody probably even noticed but me. In hindsight, I should have sprayed the entire fairway instead of spot treating where just the Poa was.

   
   
   We did some testing on tee tops with Monument, Revolver, Sencor, Kerb, and Simazine. Sencor and Kerb were the ones that gave us better control. I will be boom spraying tee slopes and green slopes on Monday. Going at 8oz/acre. These areas are pretty dormant but may set them back some.

   
   
   
   
9. Clinton Tingen

   

   0 posts
   
   2/28/2016 6:02 AM

   Xonerate is the cat's meow if you can afford it. Takes a little time but really does the trick.
   
   Clinton Tingen
   Traditions Golf Club at Chapel Ridge

   
   
   
   
10. Joshua Sawyer

    

    0 posts
    
    2/29/2016 7:02 AM

    Good thread guys...after speaking to the experts here in SC...the recommendation is higher rates of Revolver (up to 25 oz/A). Follow this by two syringe cycles the next morning bc this product is redistributed in the guttation for a couple of days-you can have tracking. Revolver is not supposed to have as much lateral movement in the soil as other sulfonyl ureas, but tracking is an issue. We will be skipping about one sprayer around bent grass greens for safety.
    
    Sencor will definitely set back the bermuda, but if you can live with it, it should work well. I haven't used Xonerate bc of cost. We have spot sprayed some Finale (similar to the Diquat suggestion).
    
    I would echo the sentiment that if you are going to set it back, set it back uniformly so nobody knows. Unfortunately, we have been battling shade and drainage coming out of winter, so I am trying not to be too aggressive. I am going to try the Revolver approach...we shall see. Thanks.

    
    
    
    
11. Justin Murray

    

    0 posts
    
    2/29/2016 9:02 AM

    We tested Revolver at 4x rate (68oz/acre) and it did not provide acceptable control for us.

    
    
    
    
12. Joshua Sawyer

    

    0 posts
    
    3/4/2016 8:03 AM

    Justin...did you have any phyto/green up issues at that rate, or did you do it this season? Thx.

    
    
    
    
13. Andy Jorgensen

    

    1 posts
    
    3/4/2016 2:03 PM

    Justin Murray said: We tested Revolver at 4x rate (68oz/acre) and it did not provide acceptable control for us.

    
    
    
    I would say it's resistant.

    
    
    
    
14. Bryan Taylor

    

    0 posts
    
    3/5/2016 4:03 PM

    I used Specticle preemergent on our Bermuda fairways to ding the Poa alive plus eliminate any coming back. Used Kerb or Revolver to take care of anything that stayed green after Specticle was applied. Had great results that were superior to Ronstar that was used around greens.
    
    Bryan Taylor

    
    
    
    
15. James Schmid

    

    1 posts
    
    3/5/2016 9:03 PM

    Andy Jorgensen said:

    Justin Murray said: We tested Revolver at 4x rate (68oz/acre) and it did not provide acceptable control for us.

    
    
    
    I would say it's resistant.

    
    
    Revolver and most of its close relatives don't work well if it is cold

    
    
    
    
16. Justin Murray

    

    0 posts
    
    3/7/2016 10:03 AM

    Joshua Sawyer said: Justin...did you have any phyto/green up issues at that rate, or did you do it this season? Thx.

    
    
    These apps are being done this season so will watch for any delay in green up from the sencor.
    
    We used specticle on our fairways and roughs with very good control.
    
    Poa is a beast and getting to be expensive to control. Like Andy said, I knew/thought we had some resistance problems and now we just have too look for ways to control it.

    
    
    
    
17. Eric Eguaras

    

    0 posts
    
    5/7/2016 9:05 PM

    I have used Revolver for many years and a mid to high rate and have had excellent results controlling poa in bermuda. I have also used Tribute Total and have had excellent results as well.

    
    
    
    
18. Joshua Sawyer

    

    0 posts
    
    5/10/2016 8:05 AM

    Just a follow up-this thread was created a couple of months ago. Revolver at the 20-25 oz rates worked fine, it just needed the warmer weather to kick in. It took several weeks past application for the removal. Took out Poa and volunteer Ryegrass. We only used this away from greens, but I wish I had done a little more.
    
    Where I had clumps near the bent grass greens and didn't want to risk tracking or movement, we back packed Finale with a very tight pattern on an adjustable cone nozzle (like a 1" pattern). Sprayed just the crown of the plants at 3 oz/gal...this smoked the weed plant, dinged the bermuda like a small spring dead spot. I can live with it, but not crazy about it...and impossible to get everything.
    
    In hindsight, I would probably go the route of Xonerate early in spring...here I am in May getting ready for tournaments and I now have some to finish cleanup around bent grass. At least it will be safe. Won't touch volunteer rye, so we are gonna finish cleanup with Finale.

    
    
    
    
19. Graham Kornmeyer

    

    0 posts
    
    1/27/2017 9:01 AM

    Joshua Sawyer said: Just a follow up-this thread was created a couple of months ago. Revolver at the 20-25 oz rates worked fine, it just needed the warmer weather to kick in. It took several weeks past application for the removal. Took out Poa and volunteer Ryegrass. We only used this away from greens, but I wish I had done a little more.
    
    Where I had clumps near the bent grass greens and didn't want to risk tracking or movement, we back packed Finale with a very tight pattern on an adjustable cone nozzle (like a 1" pattern). Sprayed just the crown of the plants at 3 oz/gal...this smoked the weed plant, dinged the bermuda like a small spring dead spot. I can live with it, but not crazy about it...and impossible to get everything.
    
    In hindsight, I would probably go the route of Xonerate early in spring...here I am in May getting ready for tournaments and I now have some to finish cleanup around bent grass. At least it will be safe. Won't touch volunteer rye, so we are gonna finish cleanup with Finale.

    
    
    I have a friend in Atlanta that sprays Diquat in the winter and early spring with a lot of success for Poa.

    
    
    
    
20. Joshua Sawyer

    

    0 posts
    
    1/30/2017 10:01 AM

    Graham:
    
    I would be interested in a contact if you didn't mind. We are in a similar situation as last year with Poa break thru, but the warm weather is really trying to green up my bermuda. I would like to speak to someone who has some success with similar programs...I am still riding the fence on what the right fit is for us.

    
    
    
    
21. Graham Kornmeyer

    

    0 posts
    
    2/2/2017 5:02 AM

    Sent you a PM Josh