Summer Patch Cancel The title field is required!

1. Christopher Chapman

   

   0 posts
   
   8/9/2011 1:08 PM

   I have been diagnosed with summer patch on my bentgrass greens. Typically summer patch is not an issue on bent but my ph are in the mid 7's which makes them more susceptible to SP. I am no getting good control chemically, anyone have any luck checking SP during the stress of the summer? I will be working on lowering my ph but this will take months to substantially change.
   
   Chris

   
   
   
   
2. Clay Putnam

   

   33 posts
   
   8/9/2011 1:08 PM

   Summer patch on Bent? I don't want to sound like a doubting-thomas but are you sure it is Summer patch? I've seen my share of Summer patch on Poa but never on Bent. Could it be Take All patch? Or possibly more Poa in the grass stand than is realized?
   
   As I know Summer patch, once you have it the damage is done. It is very difficult to gain control once the symptoms have set in. DMIs and Heritage are labeled for Summer patch but they should be sprayed prior to the onset of symptoms and after soil temps have reached 65 degrees. Once symptoms have appeared, any spray needs to be watered in to get the fungicide to the roots.The symptoms of Summer patch appear due to summer stress. Therefore, diligent watering is needed to keep the roots moist. Then the normal and customary emergency steps of raising HOC, reducing traffic, reducing wear (solid rollers, no top dressing, etc).

   
   
   
   
3. Hardy Andrew

   
   8/11/2011 8:08 AM

   In the US the product is Clearys 3336 to shutdown the disease. Sparayed at a 2 Gallon rate and watered in for 5-10 mins. Summer Patch is not immune to Bent but it is rare. It may be exposing a greater problem such as shade, airflow and fertility problems. I have dealt with Summer Patch off and on for 7 years now and it seems like you have a solution and then it doesn't work the following year. This year we have raised HOC, aerated, overseeded and topdressed. Good luck

   
   
   
   
4. Larry Stowell

   

   0 posts
   
   8/11/2011 11:08 AM

   When you have summer patch or take-all patch on bent, start thinking poa. Imagine roots being only 1-2 inches long. Frequent irrigation will be needed (unfortunately to the detriment of the healthy longer-rooted plants). Hand watering and afternoon syringing are important - never let the top two inches dry out - that is where new roots will develop if it is not too hot. Increase fertility - frequent light applications - remember no roots. Heritage at 0.4 oz/1000 sq ft on a three week interval will shut down infections on new roots and stop activity on old roots, but the damage there has already been done. Rotate with thiophanate-methyl (4 oz/1000 sq ft) and a phosphite (e.g. Weekly rotation Heritage week -1, Cleary's 3336 week-2, - Chipco signature week-3 all at top of label, applied in 2 gal/1000 sq ft repeat until symptoms disappear or recovery is substantial). Also send a sample for nematode analysis - we see worse problems when root knot and summer patch are both present. For next year, check soil manganese levels and target 30 ppm or a little higher using Mehlich-3 extraction - pH is a component, but much of the pH impact is on availability of manganese.
   
   Roots at dissecting microscope magnification
   http://www.paceturf.org/photo/showphoto.php?photo=1343
   
   Closeup of ectotrophic hyphae and growth cessation structures
   http://www.paceturf.org/photo/showphoto.php?photo=1344
   
   Photo of take-all patch on bent grass with simple hyphopodia
   http://www.paceturf.org/photo/showphoto.php?photo=195
   
   Magnaporthe summary by Jim Kerns:
   http://www.cals.ncsu.edu/course/pp728/M ... hepoae.htm

   
   
   
   
5. Ronald McCarthy

   

   0 posts
   
   8/11/2011 12:08 PM

   I have knocked Summer Patch out using heritage at the .4oz/1000 rate every 7 days. The best way to treat is to use a watering tank, ours is 300 gallons and we add 2oz of heritage and hand water the spots. Also to lower the pH use the tank again and lower the water pH to 4.0 and hand water the spots, knocks the pH down in those areas nicely. I have gone down to 2.0 on the pH with no damage to bent/poa. Battery acid works good to lower the pH. Fill a tank up with 100 gallons and go hand water one of your greens that you are confident of the size to calibrate
   
   The damage is done this will just stop any more damage and allow the areas to fill in, seed them and treat the areas as a seed bed - you should be fine and a few weeks.

   
   
   
   
6. Jason Osterhoudt

   

   0 posts
   
   8/13/2011 3:08 PM

   We recently had a USGA TAS visit. They mentioned t0 apply .2 #/1000 of granular Ammonium Sulfate and water it in. The Ammonium Sulfate will temporarily lower the ph level in the thatch where the summer patch is doing the damage. Then also apply 3336 and water it as suggested before.. The only problem would be is to time it when pythium isn't ramping up. Then you have just created a bigger problem then you already had.
   
   Hope this works and good luck. Just keep plugging along.. One good note is the home depot in my area just got their shipment of mums in...October is just around the corner
   
   
   Jason Osterhoudt
   
   Echo Lake CC
   Westfield NJ

   
   
   
   
7. Dean Chase

   

   3 posts
   
   8/14/2011 12:08 PM

   I too would question the summer patch on bent greens diagnosis. But if you want to cover your bases go with Heritage and 3336 at the high rates with some N. manganese will also help lessen the symptoms of Take All. And AS as an N source would be ideal.

   
   
   
   
8. Daryck Beetham

   

   2 posts
   
   8/23/2011 5:08 PM

   We had sever summer patch on one of our greens in Maryland during the heat of the summer. We applied eagle @ 1.2/m and verticut. Problem solved, but every course is different. Good Luck!

   
   
   
   
9. Larry Taylor

   

   0 posts
   
   7/12/2016 2:07 PM

   Anybody out there have any tips for summer patch? I have sprayed preventatively and still seem to get it. Not on all our greens but just enough to piss you off after you think you should have it handled. I rotate Lexicon, Briskway, Headway apps in cooler weather and others. Anyone have a different fungicide app or tips? I'm in the transition zone in Oklahoma on SR1020.

   
   
   
   
10. Stephen Johnson

    

    0 posts
    
    7/13/2016 10:07 AM

    I don't know what you timing is on starting your preventative, but after battling Summer patch for a couple of years I have gone to Tartan in the spring with two applications 28 days apart the first in early to mid April and then early Mayish.
    I don't think this application alone has prevented my Summer patch issues but is a large factor in reducing it.

    
    
    
    
11. Kenneth Ingram

    

    18 posts
    
    7/14/2016 7:07 AM

    Larry I second Stephen's post. Best control we had at UMD was 2 apps of Banner at 4oz's April 1st and May 1st watered in. An ancillary benefit to those app's is decent Poa seedhead control. Cultural stuff really helps as well, raise mowing height, lower soil pH, reduce stress, etc. Kenneth Ingram, UMD.

    
    
    
    
12. Charles Lafferty

    

    0 posts
    
    7/15/2016 12:07 PM

    3336 is the only curative fungicide for summer patch. go at the high rate and water in then follow up with insignia 14-21 days later. Wouldnt hurt to put a touch of ammonium sulphate in the tank as well

    
    
    
    
13. Larry Allan

    

    0 posts
    
    7/15/2016 2:07 PM

    Charles Lafferty said: 3336 is the only curative fungicide for summer patch. go at the high rate and water in then follow up with insignia 14-21 days later. Wouldnt hurt to put a touch of ammonium sulphate in the tank as well

    
    I agree with Charles on this. The 3336 with ammonium will do the trick. It will also stop anthracnose dead in its tracks. I wouldn't use the 3336 too often as resistance is a big problem

    
    
    
    
14. Robert Hall

    

    0 posts
    
    7/15/2016 11:07 PM

    Do you use any stress guard pigment products? SR1020 is a great bentgrass btw, I have 3.5 acres of SR1119
    
    Yankee Bob

    
    
    
    
15. Larry Stowell

    

    0 posts
    
    7/16/2016 9:07 AM

    As long as soil temperatures are above 65 F, summer patch will be a threat. Rotations between DMI and QoI fungicides are reliable - but application interval of more than 14 days can lead to failure. Check this video out:
    
    https://m.youtube.com/watch?v=PmBCDXYc8F4

    
    
    
    
16. Larry Taylor

    

    0 posts
    
    7/18/2016 10:07 AM

    Thanks for the response! In the past I have sprayed 3336 but with the new fungicides out I tend to forget about the old ones that work so well. I need to get an app of that out.
    
    The only thing pigment wise that we spray on greens would be Signature. I tried some others but couldn't really get it to work in the budget.
    
    Thanks again for the help!

    
    
    
    
17. Jeffrey Sexton

    

    0 posts
    
    7/18/2016 6:07 PM

    2 Bayleton applications when soil temperatures reach 55 degree in the spring 3 weeks apart will knock it on its butt. Water in after application.

    
    
    
    
18. Christopher Randolph

    

    0 posts
    
    8/1/2016 8:08 PM

    Medallion. Best fungicide for summer patch. Apply in fall and spring. Spring wait for soil temp to come up a bit. water in