Minimum GPA you have sprayed? Cancel The title field is required!

1. Nicholas Johnson

   

   0 posts
   
   2/2/2016 10:02 AM

   I am looking to maximize the number of acres per tank for pre and post herbicide applications this year. After reading through a bunch of different labels, many of the products have application rates as low as 10 GPA, (Specticle, Tower and Pennant to name a few). Does anyone really spray that low? Obviously, a higher GPA will provide more thorough coverage, but if it's on the label then it must work at that rate, right?
   
   The lowest I have ever gone is 26 GPA and results were fine, but if I could spray a lower GPA, then more acres per tank will let me cover both courses in much less time.
   
   Thanks for your replies!

   
   
   
   
2. Mark Semm

   

   0 posts
   
   2/2/2016 2:02 PM

   25 GPA here on fairways.
   
   Used to be at 50 GPA but that was quite a bit of mixing.
   
   What used to be 7-8 tank is now 3.
   
   Haven't seen any adverse results from the lower GPA...

   
   
   
   
3. David Soltvedt

   

   0 posts
   
   2/2/2016 4:02 PM

   Mark Semm said: 25 GPA here on fairways.
   
   Used to be at 50 GPA but that was quite a bit of mixing.
   
   What used to be 7-8 tank is now 3.
   
   Haven't seen any adverse results from the lower GPA...

   
   
   What other products do you spray at that rate...and what nozzles do you use?

   
   
   
   
4. Steven Huffstutler

   

   11 posts
   
   2/3/2016 6:02 AM

   I spray greens at 40gpa. I spray everything else at 30 gpa.
   
   Steve

   
   
   
   
5. Matt Dutkiewicz

   

   0 posts
   
   2/3/2016 9:02 AM

   Steven,
   Just curious about what kind of nozzles you are using? I will be replacing nozzles this year and looking to try something more efficient and effective. (Have been using air induction flat fan)

   
   
   
   
6. Michael Wagner

   

   0 posts
   
   2/3/2016 6:02 PM

   As an assistant I once mixed twice as much banner in a 300 gallon tank as I was supposed to. We had planned on spraying at 25 gpa on fairways. I caught the mistake before we started spraying and the best fix we could come up with was to spray at 12.5 gpa. In order to get the sprayer to do that with the nozzles we had I was traveling at about 7 mph. Needless to say it was interesting but I sprayed all 24 acres of fairways with one tank in under 3 hours. I was surprised it worked and we got our usual 21 days of control. I certainly wouldn't recommend doing it like this but it always made me wonder. I have always sprayed broadleaf weeds at 25 gpa but I see no reason you couldn't go even less than that. You would just need the right nozzles for the speed and volume you want to spray. My regular sprays are 65 gpa greens, 50 gpa tees, 25 gpa fairways, regardless of the products I'm spraying.

   
   
   
   
7. Andrew Cross

   

   5 posts
   
   2/3/2016 8:02 PM

   You guys are blowing my mind with these low rates. We spray greens and tees at 108.9GPA (2.5Gal/M) an Fwys and roughs at 56.6GPA (1.3Gal/M)

   
   
   
   
8. Melvin Waldron

   

   43 posts
   
   2/3/2016 8:02 PM

   We spray fairways at 40 gallons per acre, 65 gallons per acre on greens. Difference is 2nd gear or 1st gear on our Toro 1250.
   
   I guess I should play with different nozzles and see if I can get lower for weed control anyway.
   
   Mel

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

   

   0 posts
   
   2/4/2016 6:02 AM

   Getting to be quite an interesting thread...I too am on the water-heavy end of spraying. We spray Greens/Tees at 80gpa and Fwys at 45gpa. Very interested in the nozzle types everyone is using for the lower gpa sprays

   
   
   
   
10. Joshua Sawyer

    

    0 posts
    
    2/4/2016 6:02 AM

    We have consistently sprayed greens at 1 gal/M with flat fan air induction nozzles with good results. We have increased our speed to 5 mph in fairways at similar calibration. I couldn't see any real difference in application, but it did get a little dicey operating the sprayer in some areas. The automatic controllers makes it possible to change speeds on the fly, so you could slow down where needed. This didn't reduce tanks, but drastically reduced the time for fairway applications.

    
    
    
    
11. Nicholas Johnson

    

    0 posts
    
    2/4/2016 7:02 AM

    My nozzle of choice for a majority of my sprays is the TeeJet Air Induction Turbo Twin Jet 11006. For greens and tees 4 mph, 40 psi will get me 45 GPA. If I need to increase the volume for an application, I can spray at 2.4 mph and 40 psi to get 74 GPA. For fairways and other bigger applications 6 mph, 30 psi will get me 26 GPA. For my applications, a very versatile nozzle.
    
    The 26 GPA is fine for spraying fairways and I also used it for my pre-emergent spray last fall, but even at that rate is was 21 tanks to spray both courses. If I could cut that number down, it would obviously help us get done faster. The lowest GPA I have come across someone spraying is 20 GPA (which was within the label rate for that product).
    
    I spoke with my Bayer representative as Specticle is on of the products that is labeled at a minimum of 10 GPA, and he said 10-20 GPA is fine as the product will be watered in anyways. He did not know of anyone spraying at 10 GPA though.
    
    My original question should have been phrased a little bit differently as each product has different ranges for application rates as some have a minimum of 10 GPA, some may be 50 GPA. Maybe I should have asked who is using the minimum labeled GPA for their applications?
    
    Thanks for all the replies!

    
    
    
    
12. Christopher Thuer

    

    101 posts
    
    2/8/2016 12:02 AM

    200 gal fairway and rough sprayer = 17 gals per acre. All products. Post herbicides get a sticker included. Fungicides get Sync included

    
    Chris Thuer, CGCS, Bear Slide Golf Club, Cicero, IN
    
    
13. Dalton Andrew

    
    2/8/2016 8:02 AM

    Those are some low rates. Never even entertained the thought of going that low. Doesn't make sense to me, but to each your own I spray greens at 75gpa, and fairways and tees at 60gpa. The lowest I ever go is a herbicide application in roughs at 30gpa with a good spreader sticker. I use green leaf nozzles for the fairway and rough apps and teejets on greens.
    
    Andrew Dalton
    Metamora Golf and Country Club

    
    
    
    
14. James Smith

    

    112 posts
    
    2/12/2016 10:02 AM

    we spray at 33gal/acre. when I am using a chemical that needs more water per acre we simply lower the amount of chemical per acre and spray two directions.

    
    
    
    
15. Canedo Alberto J

    
    2/12/2016 2:02 PM

    I spray my greens and tees at 140 gallons per acre. I have the nozzle set up for 20 gallons an acre, but will not go that route. Everyone has their preference and this is what I like to do.

    
    
    
    
16. Christopher Thuer

    

    101 posts
    
    2/14/2016 11:02 AM

    Getting the fairways sprayed ahead of play is important. In Indiana, the state chemist office has written fines of $500 for spraying fairways too near golfers. The low rate means 2 tanks so we don't waste time refilling more than once. The sprayer is usually on #9 as the first group is teeing off 1. Then finishing spraying 18 when the first group is on 13. They try to play in 2 hours but we slow them down on spray days.
    
    One 200 gallon tank for the front 9, 12 acres, and about 165 gals for 9 acres on the back. We spray every 2 weeks and very rarely have an issue with disease.
    
    Tee Jet TT11004, 20 psi with booms on.
    
    I do spray greens at 66 gals per acre, and tees/aps at 40 gals per acre. Two 100 gal tanks for each.

    
    Chris Thuer, CGCS, Bear Slide Golf Club, Cicero, IN
    
    
17. Lisa Wick

    

    1 posts
    
    2/15/2016 5:02 PM

    Good afternoon - I'm not sure why this post caught my eye from the home page. But in reading it, I see there is quite a bit of discussion about nozzles. Aaron Patton, Ph.D., taught a webcast for us in Jan. of 2015 titled Calibrating Sprayers and Selecting the Right Nozzles that covers quite a bit of detail on selecting, depending upon what you are spraying. It might provide some good intel for you. Direct link is here:
    
    http://www.gcsaa.tv/webinars/education/view.php?id=98 He also gives some good tips on how to help the person spraying understand the process. Lisa

    
    Lisa Wick, sr. manager, e-Learning Programs
    
    
18. Brewer Stephen C

    
    2/23/2016 10:02 AM

    I spray 85gal/Acre on my greens and 25gal/Acre everywhere else. I use the Air Induction nozzles for both applications I use the AIC 11010 for the greens and the AIC 11004 for everything else. Had great success with both and have seen nothing to make me rethink that.

    
    
    
    
19. Damon Lerchen

    

    0 posts
    
    3/8/2016 11:03 AM

    We spray 22 gallon an acre all the time pre-emegents plus post. For example, we aprayed 6.5 oz. of Specticle Flo and Celsius @ 3.2 oz. zero weeds on 216 acres going on 5th month. We use the turbo jet dual nozzles(red).
    
    Toro workman 200 gallon sprayer, 9 acres per tank.