Summer Patch Management Cancel The title field is required!

1. Michael Armstrong

   

   0 posts
   
   9/22/2012 1:09 PM

   For those of you that struggle with summer patch, have you had success using acidifying fertilizers in your program? Ammonium Sulfate and Manganese Sulfate come to mind. What rates and intervals are you using? This the first season it has popped and caused some problems. Trying to incorporate some new practices along with my fungicides. Thanks in advance!

   
   
   
   
2. Kenneth Ingram

   

   18 posts
   
   9/24/2012 12:09 PM

   Don't know if you mean K.Bluegrass in roughs or Poa greens. UMD did a lot of work with acidifying ferts. They do help, especially in K.Bluegrass. One thing you don't want to hear is that Daconil actually encourages summer patch. Like anthracnose, relieving stress is a big deal also. Usually about 1 week after greens wilt badly the summer patch will start. Kenneth Ingram, UMD.

   
   
   
   
3. Michael Armstrong

   

   0 posts
   
   9/24/2012 2:09 PM

   Kenneth Ingram, CGCS said: Don't know if you mean K.Bluegrass in roughs or Poa greens. UMD did a lot of work with acidifying ferts. They do help, especially in K.Bluegrass. One thing you don't want to hear is that Daconil actually encourages summer patch. Like anthracnose, relieving stress is a big deal also. Usually about 1 week after greens wilt badly the summer patch will start. Kenneth Ingram, UMD.

   
   
   I am referring to poa greens. Thanks for the info. Funny you mention the wilting of the greens. I started seeing early symptoms following the first major dry down of the season.

   
   
   
   
4. Verrips Thomas K

   
   9/24/2012 2:09 PM

   Just finished watching a 2012 TurfNet archived webinar by Dr. Jim Kerns from the University of Wisconsin titled "Managing Summer Stress and Summer Diseases in Cool Season Grasses". He talks about Summer Patch and fertilization quite a bit and said it definitely helps. He cautions not to use ammonium sulfate on greens in the summer but on using foliar applied urea as well as other things you can do. Check out the webinar if you can. One of the best I have watched.

   
   
   
   
5. Jeffrey Sexton

   

   0 posts
   
   9/24/2012 3:09 PM

   High rates of banner in the spring will help greatly! 4 oz./M
   
   Jeff Sexton
   Evansville CC
   Evansville, IN

   
   
   
   
6. Michael Armstrong

   

   0 posts
   
   9/24/2012 3:09 PM

   Jeffrey Sexton said: High rates of banner in the spring will help greatly! 4 oz./M
   
   Jeff Sexton
   Evansville CC
   Evansville, IN

   
   
   Have you had any adverse effects applying that much banner? Never gone above 3 oz before.

   
   
   
   
7. Hardy Andrew

   
   9/25/2012 4:09 AM

   The Vincelli report from the U of Kentucky has the most comprehensive data on Summer Patch. I have battled it here for 4 years now and have a formula that works pretty well here. A large dose of a strobi at the beginning of June (washed into 3-4" my root depth for Poa). Then I will spray Thiophenate-methyl on a weekly dose (when flare-ups occur or will occur) with an acidifying agent and an Ammonium Sulfate soluble fertilizer.
   
   Couple of other things that have helped include .25lbs of granular fertilizer at the beginning of June and second week of July to build up and feed the plants headed into the stress period. And this year I learned the importance of greens rotors functioning 100% all the time. The two greens I got the worst damage/stress on were a result of heads not turning and the Summer Patch moving right into those drought stressed areas. And find a really good wetting agent to avoid the drying/soaking of greens. I never used one religiously until this year and I think it really did help.
   
   Just a few thoughts on my experiences.