GDD Intervals for Primo on Poa Cancel The title field is required!

1. Rocky Tharp

   

   0 posts
   
   11/16/2016 11:11 AM

   I've found numerous articles, charts, and calculators online but can't seem to find an accurate GDD interval for spraying primo on Poa greens that is based on Fahrenheit. Most of the models I see suggest around a 230 GDD interval but are based on Celsius and that's going to change if I'm using Fahrenheit. Also, that model uses 0 degrees as a base which would be 32 degrees as a base in Fahrenheit. Are most guys using 32 degrees for a base or 50 degrees?
   I've had pretty good success over the years just winging it during the warmer months but I'm experimenting with spraying primo farther into the colder months and need to get it dialed in.
   
   Rocky Tharp
   Interbay GC
   Seattle, WA

   
   
   
   
2. Stephen Johnson

   

   0 posts
   
   11/16/2016 2:11 PM

   The University of Wisconsin GDD chart is in Fahrenheit, it even offers the password to unlock and alter the formulas, so you could input your own parameters.

   
   
   
   
3. Eric Johnson

   

   1 posts
   
   11/17/2016 6:11 AM

   I received the file from Bill Kreuser at U Nebraska-Lincoln. I believe you can download the GDD Tracker from the website but the sheet is only setup for the typical growing season (Apr-Oct). I asked and he setup the Tracker for January 1 through December 31.
   
   Let me know if you have any questions.

   
   
   
   
4. Melvin Waldron

   

   43 posts
   
   11/17/2016 8:11 AM

   Eric Johnson said: I received the file from Bill Kreuser at U Nebraska-Lincoln. I believe you can download the GDD Tracker from the website but the sheet is only setup for the typical growing season (Apr-Oct). I asked and he setup the Tracker for January 1 through December 31.
   
   Let me know if you have any questions.

   
   
   Thanks! That's great, especially this season.
   
   Mel

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