Resistant POA in Mini Verde Cancel The title field is required!

1. Jonathan Hindes

   

   0 posts
   
   2/23/2015 8:02 AM

   Anyone else having a hard time finding a product for resistant poa in UD greens? We have sprayed revolver and monument the past 5 years in winter time and had great success. The mini-verde does not go completely dormant. The last two years we have seen populations of resistance poa multiply. Anyone using Xonerate? I am going to try a test with some but am concerned about issues during spring green up. Cost is not a factor just need something that can control the poa. We overseed tees, fairways, collars and approaches in the fall.(no greens) We control poa in the overseeded surfaces with Trimmitt and Barricade and have good control in rough with specticle. Currently we do not use pre-emergent on greens. We have considered Kerb but it would be difficult to keep out of the overseeded areas. Any feedback will be much appreciated.
   
   Carter Hindes
   Houston, TX

   
   
   
   
2. Cecil Daniel

   

   0 posts
   
   2/23/2015 9:02 AM

   We have a bad issue with resistant poa. I took over last year at the first of the year. Last year was the first year we did not overseed. The seed had hidden the poa for the most part in previous years. Monument did nothing about the poa. I sprayed kerb in the first part of March because the term "bumper pool" was floating around the men's locker room. The kerb burnt us up on weak spots and overlaps. We went 1lb active per acre on tifdwarf greens. Savannah ha area. It took out the poa, but it was two months before we were totally filled in. I sprayed kerb again in November just when I saw the first few little sprouts. Split apps for a total of .75lb active per acre. This worked great. I skipped the weak areas on the second spray and we hand picked out any poa that made it through. If you use kerb on greens definitely spit the app. It will also really move in the soul on a slope. Good luck

   
   
   
   
3. Schott Matthew

   
   2/28/2015 8:02 AM

   Have you used tranxit?

   
   
   
   
4. Jonathan Hindes

   

   0 posts
   
   3/2/2015 8:03 AM

   Thanks for the reply. We have not applied Tranxit. Being that Tranxit (Rimsulfuron) is an ALS inhibitor just like Revolver or Monument I would think that we would be resistant to all in this class. I recently sent some poa for test for ALS resistance.

   
   
   
   
5. Justin Lonon

   

   1 posts
   
   3/3/2015 10:03 AM

   Cecil,
   How many days between the two apps/

   
   
   
   
6. Reagan Olson

   

   0 posts
   
   3/3/2015 4:03 PM

   Im in the same boat as you are as far as Revolver and Monument not working. Im going to do a test plot of Sencor using daubers and see what happens.

   
   
   
   
7. Cecil Daniel

   

   0 posts
   
   3/6/2015 12:03 PM

   The two apps were a day apart. I wanted all the chemical down in the same week. I probably could have just sprayed twice the same day but we had been dealing with a few local dry spots and I didn't want the chemical to just run off of them. I sprayed on Thursday then followed with light water. Then I did the same in Friday. On Saturday I lightly watered again. After that I just waited. The greens went a little off color but rebounded fine in a few weeks.
   I've heard senior is hot. If you try kerb now you may slow the green up. I'm not sure .75 lb ai/acre would get mature poa. Probably need 1 lb. the split apps help prevent the burn at overlaps. You can also turn off a boom if you pass over a weak spot.
   Good luck guys. Use kerb next fall for pre emerg. Wait till you see the first little hair of poa then spray

   
   
   
   
8. Clint Evans

   

   0 posts
   
   3/9/2015 2:03 PM

   Hopefully someone will pick up Rubigan and that will again be an option. Still never understood why it went away.

   
   
   
   
9. Justin Lonon

   

   1 posts
   
   3/11/2015 1:03 PM

   Thanks Cecil,
   We sprayed do application of Kerb this year at 1lbai/A. The first application was just before Thanksgiving and the second was 45 days later. We had some burn on the overlaps but green were Poa free. Just looking for ways to improve next fall. I may try the split application next year.

   
   
   
   
10. Cecil Daniel

    

    0 posts
    
    3/12/2015 5:03 PM

    Justin
    Wow a second app another lb. A few came through my .75, but nothing we couldn't hand pick. I would have been too afraid to spray again.

    
    
    
    
11. Reagan Olson

    

    0 posts
    
    2/18/2016 3:02 PM

    Any luck with Kerb? any issues with the MIni coming back or not?

    
    
    
    
12. Stephen Johnson

    

    0 posts
    
    2/18/2016 3:02 PM

    It might be too risky on UD's, but have found that the medium rate of Dimension split three times works well on bentgrass in the lower transition zone

    
    
    
    
13. Cecil Daniel

    

    0 posts
    
    2/19/2016 6:02 AM

    I did not have to treat greens this year. I had kerb on the shelf, but never saw enough poa to justify the app. I have heard of the seeds being viable in the soil for years, but we stopped it before it went to seed last year. This year it has been easy enough to get them with a pocket knife. I would not spray kerb now though. Going into spring is when kerb is harsh on the Bermuda.

    
    
    
    
14. Andy Jorgensen

    

    1 posts
    
    2/19/2016 6:02 AM

    For those battling resistant Poa on your playing surfaces....Dr. Jim Brosnan at The University of Tennessee offers a testing service to confirm your fears. He did some for me this past year and it has helped justify spending the extra money for a better control option. Fortunately, I was only resistant to ALS herbicides and Kerb remains a viable option.
    
    You can find out more by contacting Dr. Brosnan at jbrosnan@utk.edu.

    
    
    
    
15. Reagan Olson

    

    0 posts
    
    3/13/2016 9:03 PM

    Cecil, how long did it take for the overlaps to fill back in and green up?

    
    
    
    
16. Cecil Daniel

    

    0 posts
    
    3/14/2016 9:03 AM

    Looking at my notes I could still make out the worst of the chemical burn 2 months (5/14) after my spray day (3/10). These were areas where we have shade issues or large overlaps. We did not see any spray pattern for a month after applying the kerb. So, we only really saw the spray pattern for about a month. That being said, we had a few ugly spots. Kerb in the spring is tough on the grass.
    
    We never saw any damage when we applied in the fall. What rate did you go and when? Also where are you located? Did you split the app or just go out in one shot.

    
    
    
    
17. Cecil Daniel

    

    0 posts
    
    3/14/2016 10:03 AM

    The label says that you can spray activated charcoal to deactivate the chemical. We did not try it, but might be worth it if the burn is severe.

    
    
    
    
18. Jonathan Hindes

    

    0 posts
    
    3/28/2016 1:03 PM

    Sprayed Bensumec this year 6 times, 3 ounces/Acre, per application, 3 weeks apart. Got about 75% control which was a success. Our biggest problem is that we overseed collars and approaches along with fairways and tees. With how much Kerb moves in the soil, Bensumec seemed like our best option. Had one green that we had mild run-off onto a collar which was better than expected. Happy to be renovating fairways this summer so no more overseed!!

    
    
    
    
19. Justin Lonon

    

    1 posts
    
    3/29/2016 11:03 AM

    Before I got here, they had several greens that were 75% Poa come late January early February. The previous superintendent used Pre-San with success until 2013-2014. He sprayed Revolver, Monument and Tribute total with no success. He then sprayed Kerb in late March or early April and smoked the Poa along with some Bermuda. In the winter of 2015, I was told they didn't want to see any Poa, so we sprayed Kerb @1lbai the week of thanks giving and another application @1lbai 45 days later. It was a little scary in places that were overlapped but we were 100% clean of Poa. This winter we split the application of Kerb four days apart spraying in opposite directs with no issues. There was no need for the second application come January. We has a few plants break through but nothing to warrant another application of Kerb. I have thought about rotating Anderson's Goose/Crab to reduce the threat of resistance to Kerb. I've heard it has had good control in the Houston area and will test it on a putting green this winter.

    
    
    
    
20. Sandy Clark

    

    0 posts
    
    3/29/2016 3:03 PM

    Are you sure it is resistant rather than the poa just growing in the thatch and not actually in the soil? We thought we had a problem a few years back. Once we removed a lot of thatch, our control products suddenly started working better. If it is growing in the thatch, few if any of the products that prevent germination work very well since they prevent seed from germinating through the barrier set up in the soil. Barrier doesn't really set up in thatch. Just an additional thing to consider before you give up on any of the products.

    
    
    
    
21. Brent LeBlanc

    

    0 posts
    
    4/14/2016 11:04 AM

    I fought resistant poa this year, and decided to spray Xonerate on Mini Verde Greens @ 2oz/acre for 2 apps 14 days apart. I saw poa stressing at 3 days and it began melting out. within a month, all the poa was gone. these were fairly mature plants on greens sprayed in March