Slide Presentation

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AUTHOR
Eric P. Prostko
Professor and Extension Weed Specialist
University of Georgia

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TABLE OF CONTENTS
  1. Sprayer Nozzles and Droplet Size
  2. Coverage vs. Drift Control (It’s all about droplet size)
  3. Droplet Size
  4. Volume Median Diameter (VMD)
  5. Spray Tip Classification by Droplet Size
  6. Distance of Visual Dicamba Damage from Drift in Cotton. Moultrie GA. 2018.
  7. VMD for common nozzle types
  8. Size Matters: Advantages & disadvantages of different droplet sizes
  9. You Can Put More than 1 Nozzle on a Boom
  10. What Nozzles Do I Like?
  11. Other Common Nozzle Questions
  12. Nozzle Requirements for Auxins (tolerant cotton and soybeans)
  13. How do "auxin" nozzles work in real world?
  14. 2017/2018/2019 Nozzle Tests VMD50 and Coverage
  15. Commercial Sprayer Nozzle Tests - 2019
  16. Worth County Nozzle Test April 4, 2019 (Rep 2, card #2)
  17. Commercial Sprayer Nozzle Tests - 2019
  18. Bulloch County Nozzle Test March 21, 2019 (Rep 2, card #4)
  19. Commercial Sprayer Nozzle Tests - 2019
  20. Pierce County Nozzle Test March 26, 2019 (Rep 1, card #5)
  21. Droplet Size and Spray Coverage from 2019 Nozzle Tests with Commercial Sprayers
  22. 2019 Nozzle Tests (Weeds, Insects, Disease, Yield)
  23. 2019 Peanut Nozzle Tests
  24. 2019 Nozzle Tests Pesticides/Fertilizers Applied
  25. Late-Season Insect, Weed, and Disease Ratings from 2019 Nozzle Tests with Commercial Sprayers
  26. 2019 Nozzle Test XRC-11004-VP
  27. 2019 Nozzle Test TTI-11004-VP
  28. 2019 Nozzle Test TDXL-11004-D
  29. Peanut Yield As Influenced By Nozzle Type from 2019 Nozzle Tests with Commercial Sprayers
  30. Summary - 2019
  31. Conclusions
  32. Liberty (glufosinate) - Nozzles
  33. What nozzle should I use?
  34. Questions/Comments?



SLIDE CONTENTS
  1. Sprayer Nozzles and Droplet Size Eric P. Prostko Professor & Extension Weed Specialist Dept. of Crop & Soil Sciences ANR Training November 2019
  2. Coverage vs. Drift Control (It’s all about droplet size) Larger (coarser) Drops Less coverage but better drift control Smaller (finer) Drops Better coverage but less drift control Coverage is pesticide dependent Contact = smaller drops Liberty, Gramoxone Systemic = larger drops Roundup, 2,4-D, dicamba
  3. Droplet Size Goal = larger droplets; eliminating fines micron (ตm) is a unit of measure equivalent to 1/25,000 of an inch.
  4. Volume Median Diameter (VMD) value where 50% of the total volume or mass of liquid sprayed is made up of droplets larger than this value, and 50% is made up of droplets smaller than this value. Dv0.5 Measured in microns
  5. Spray Tip Classification by Droplet Size 1Estimated from sample reference graph in ASBAE/ANSI/ASAE Standard S572.1 2VMD = Volume median diameter
  6. Distance of Visual Dicamba Damage from Drift in Cotton. Moultrie GA. 2018. 188 feet 128 feet 68 feet Medium (236-340) Course (341-403) Ultra Course (>665) Droplet Size (ตm)
  7. 11002DG VMD50 = 322 (M) AIXR 11002 VMD50 = 402 (C) TTI 02 VMD50 = 524 (XC) VMD for common nozzle types
  8. You Can Put More than 1 Nozzle on a Boom
  9. What Nozzles Do I Like?
  10. Other Common Nozzle Questions How much do they cost (2019)? TTI-11004-VP-CE = $9.86 XRC-11004-VP = $2.96 How long do they last? How many acres? What was sprayed? What are they made of? (brass, stainless steel, polymer, ceramic) Replace when flow exceeds 10% of new nozzle
  11. Nozzle Requirements for Auxins (tolerant cotton and soybeans) Xtendimaxฎ Enlist One™
  12. How do “auxin” nozzles work in real world? Henley Farm, Miller County, April 10, 2017
  13. 2017/2018/2019 Nozzle Tests VMD50 and Coverage R1 R2 R3 10 feet 10 feet tractor
  14. Commercial Sprayer Nozzle Tests - 2019 Patterson Farm, Worth County, April 4, 2019 JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI
  15. Worth County Nozzle Test April 4, 2019 (Rep 2, card #2) JD 4730, 90’ boom, 20” spacing, 20 GPA, 12.5 MPH, 42-57 PSI, 36” boom height XRC-11006 TTI-11006
  16. Commercial Sprayer Nozzle Tests - 2019 Sikes Farm, Bulloch County, March 21, 2019 JD4630, 90’ boom, 15” nozzle spacing, 11.6 MPH, 12 GPA, 18-20 PSI
  17. Bulloch County Nozzle Test March 21, 2019 (Rep 2, card #4) JD 4630, 90’ boom, 15” spacing, 12 GPA, 12 MPH, 28 PSI, 36” boom height (avg.) XRC-11004 TTI-11004 TDXL-11004D
  18. Commercial Sprayer Nozzle Tests - 2019 Waters Farm, Pierce County, March 26, 2019 JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI
  19. Pierce County Nozzle Test March 26, 2019 (Rep 1, card #5) JD 4730, 100’ boom, 15” spacing, 15 GPA, 11.6 MPH, 18-20 PSI, 36” boom height (avg.) XR-11006 TTI-11006
  20. Droplet Size and Spray Coverage from 2019 Nozzle Tests with Commercial Sprayers 1According to DepositScan 2According to DropletScan 3JD4630, 90’ boom, 15” nozzle spacing, 12.0 MPH, 12 GPA, 28 PSI, 36” boom height 4JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI, 36” boom height 5JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI, 36” boom height 6Means in the same row within same location with the same letter are not significantly different (THSD 0.10). Means from 21 kromekote water sensitive cards.
  21. 2019 Nozzle Tests (Weeds, Insects, Disease, Yield)
  22. 2019 Peanut Nozzle Tests
  23. 2019 Nozzle Tests Pesticides/Fertilizers Applied
  24. Late-Season Insect, Weed, and Disease Ratings from 2019 Nozzle Tests with Commercial Sprayers** 1JD4630, 90’ boom, 15” nozzle spacing, 12.0 MPH, 12 GPA, 28 PSI, 36” boom height 2JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI, 36” boom height 3JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI, 36” boom height **No significant differences were observed between nozzle type at any location (P>0.10).
  25. 2019 Nozzle Test XRC-11004-VP Bulloch Co. 9/9/19 115 DAP
  26. 2019 Nozzle Test TTI-11004-VP Bulloch Co. 9/9/19 115 DAP
  27. 2019 Nozzle Test TDXL-11004-D Bulloch Co. 9/9/19 115 DAP
  28. Peanut Yield As Influenced By Nozzle Type from 2019 Nozzle Tests with Commercial Sprayers 1JD4630, 90’ boom, 15” nozzle spacing, 12.0 MPH, 12 GPA, 28 PSI, 36” boom height 2JD4730, 100’ boom, 15” nozzle spacing, 11.6 MPH, 15 GPA, 18-20 PSI, 36” boom height 3JD4730, 90’ boom, 20” nozzle spacing, 12.5 MPH, 20 GPA, 42-57 PSI, 36” boom height 4Adjusted to 10% moisture.
  29. Summary - 2019 Spray card analysis VMD50 larger with auxin nozzles (381-481 microns vs. 182-348 microns) Coverage better with auxin nozzles in 2/3 tests No differences in weeds, insects, disease, and yield between nozzles were observed in large, on-farm field trials. Pierce Co. 10/05/19
  30. Conclusions 6 on-farm, large plot replicated trials in 2018 and 2019 + 4 site-years small-plot (weed control) No differences between nozzle type for insects, disease, weeds, and yield. Suggestions use at least 12 GPA good rotations timely applications grass control?? Worth Co. 09/24/19
  31. Liberty (glufosinate) - Nozzles “Use nozzles and pressure that generate a MEDIUM to COARSE size spray droplet. NOTE: Weed control with very coarse, extremely coarse or ultra-coarse nozzles will not provide adequate coverage and will cause unsatisfactory weed control”
  32. What nozzle should I use? What are you spraying? contact/systemic label information multiple nozzle body flat fat/ AIXR/”auxin” One nozzle for everything?????? Are you timely or late?
  33. Questions/Comments?