Thoughts on Tebuconazole as Dollarspot control? Cancel The title field is required!

1. Melvin Waldron

   

   43 posts
   
   5/25/2018 8:05 AM

   Wanted to ask a question and also post an observation.
   
   I am using the Smith-Kerns dollar spot Prediction model this season.
   
   Early in the season, we reached the risk threshold once (I'm sticking with the 20% as my threshold on Penncross Bent), but then it dropped back down, didn't see any active dollar spot and I had made a Tebuconazole application mid April for Fairy Ring prevention, so I'm guessing that provided some protection from any dollar spot as well?
   
   Recently I noticed when we did reach into the risk area, I believe last Saturday May 19th, I planned a spray using Vinclozolin, (yes there is still some out there, and I find it a good break from the newer products) on Sunday the 20th, to give me 14 days of control since I will be gone over the holiday weekend, but I was rained out, I did have another Tebuconazole spray for fairy ring scheduled for Monday the 21st. Dollar spot pressure had reached into the lower 30% range by that day and we actually saw some dollar spot mycelium active that morning. We made the Tebuconazole spray on that morning and have yet to see any dollar spot activity, even after watering in the Tebuconazole for the fairy ring and pressure is now up into the 40% range. So my observation is the Tebuconazole is a better dollar spot material then I realized?
   
   I will admit that since I will be out of town starting Sunday until next Thursday morning (anyone else working the US Women's Open? I always like putting a face with a name), we are going out with an application of chorothalonil this morning, even though I'm not seeing activity, just so I can sleep the next few days.
   
   Would love to hear others observations and ideas.
   
   Thanks!
   
   Mel

   
   Melvin H. Waldron III, CGCS, Horton Smith Golf Course, City of Springfield/Greene County MO
   
   
2. Keith Fellenstein

   

   0 posts
   
   5/25/2018 9:05 AM

   Similar situation and observations. This year, $-spot pressure was later than normal and until very recently, not that high. I usually roll the dice on early fairy ring control but have something else down before my second app., not trusting Tebucanazole to give us great control when the pressure gets high. This year we waited it out with no problems. Now treating regularly with other products. Wish I had some Vinclozolin. It was a staple in my program for many moons...great early spring and late fall for extended control.

   
   
   
   
3. Alden Maddocks

   

   11 posts
   
   5/29/2018 9:05 AM

   We are always under high dollar spot pressure, here in southern Vermont. We use Mirage with stressgard. The product tents go give us very good control for dollar spot.
   
   In the middle of the summer, I will add Secure to the mix to get longer control, as it seems like a contact gets us a little longer control. We also on a preventive spray program, for dollar spot, and I tend to reapply before the label says I need to.
   
   hope that was helpful,
   Alden

   
   
   
   
4. Keith Fellenstein

   

   0 posts
   
   5/31/2018 9:05 AM

   Always high dollar spot pressure? In southern Vermont? Compared to Missouri and central Virginia?

   
   
   
   
5. Alden Maddocks

   

   11 posts
   
   6/2/2018 8:06 AM

   The average temperature, during our growing season, falls between 60-90...every single day and we have a heavy dew every single day it is not raining out. So, yes, we do have high dollar spot disease pressure in southern Vermont.
   
   It must be nice to have such hot weather in July and August that you don't need to worry about dollar spot.
   
   Alden

   
   
   
   
6. Ryan Green

   

   2 posts
   
   2/10/2019 8:02 PM

   I've been using Tebuconazole as a part of my dollar spot program for the last 5 years. I have limited amount to spend on my chemical budget, and at $13 an acre at the 0.6 rate, it not only has performed well but been a necessity due to cost. This season, my spray prgoram was cut even deeper and in an effort to extend days of control I did notice that, in moderate pressure on greens I saw dollar spot come in lightly after two weeks.
   
   This is also after 5 years of heavy reliance on this and Iprodione for dollar spot control. Some of the generics have label rates up to the 1.1 oz which I will spray on tees and fairways where I need longer residuals.
   
   As a side note, I have used Tebuconazole ONLY on my fairways for 5 seasons and some green surrounds for snow mold with zero breakthrough - in heavy snow seasons and more moderate winters. Covers 25 acres for $350-550 depending on rate. At courses that might not spray for snow mold otherwise or those wanting to try something that is cheaper than tank mixing multiple products and can tolerate a tiny bit of breakthrough it's a great product for snow mold. By the way I have a Heinz 57 on fairways - poa, bent, tons of rye, poa triv, fescue. I should also note that I am the first super to spray fairways at my course, so there may be some natural selection going on, however they have been totally clean each year.

   
   
   
   
7. James Smith

   

   112 posts
   
   5/30/2019 7:05 AM

   Any of you guys have any issues using this when the temperatures get into the 90's. I have tif Eagle
   
   I was reading this post and was thinking it may help with some of my fairy ring issues but wondering if it was already too late. I have not see much of the fairy ring yet this year but know its coming. its just been a really cool spring for us so far.