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Calibrating your Spray equipment

Calibrating your Spray equipment. 1 of 40. Wisconsin Pesticide Applicator Training Program University of Wisconsin Extension. Purpose of Calibration. To deliver the correct rate of pesticide AND Apply it uniformly over the target area. 2 of 40. Photo source: Syngenta.

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Calibrating your Spray equipment

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  1. Calibrating your Spray equipment 1 of 40 Wisconsin Pesticide Applicator Training Program University of Wisconsin Extension

  2. Purpose of Calibration To deliver the correct rate of pesticide AND Apply it uniformly over the target area 2 of 40 Photo source: Syngenta

  3. Purpose of Calibration 3 of 40 Errors can lead to crop injury or loss of money

  4. Mini-Sprayers and Pattern Each nozzle is a “mini-sprayer” 1. Nozzle/boom height 2. Nozzle angle 3. Nozzle spacing 4 of 40

  5. Spray Rate Nozzle flow rate Speed of travel 5 of 40

  6. Spray Rate – Nozzle Flow Rate Nozzle flow rate Speed of travel Pressure OK for small adjustments 6 of 40 Have to increase 4x to double output

  7. Spray Rate – Nozzle Flow Rate Nozzle flow rate Speed of travel For larger changes in output, consider changing the nozzle Gallons per minute - GPM 7 of 40 XR 80 03 80 degree angle 0.3 GPM at 40 psi

  8. Spray Rate – Speed of Travel Nozzle flow rate Speed of travel • One to one • Speed up put less out • Easy way to make changes 8 of 40

  9. Spray Rate – Speed of Travel Nozzle flow rate Speed of travel Speed (MPH) = distance in feet x 0.68 time in seconds 9 of 40

  10. The 4 steps to Calibration 1. Determine Required Flow Rate 10 of 40

  11. The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 11 of 40

  12. The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate 12 of 40

  13. The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate 4. Determine how much pesticide and water to add to the tank

  14. 1st Step – Determine Flow Rate MPH - Decide speed GPA - Gallons per Acre are given by label W - Nozzle spacing in inches GPM = MPH x GPA x W 5940 14 of 40

  15. 1st Step – Determine Flow Rate Example: Wish to spray Whoop-IT. The label says to apply at 1 pt/A in 15 to 20 GPA. You wish to travel at 8 MPH GPM = MPH x GPA x W 5940 GPM = 8 MPH x 15 GPA x 15 5940 GPM = 0.3 This is your “required” flow rate 15 of 40

  16. 2nd Step – Actual Flow Rate Required flow rate is 0.3 GPM If all your nozzles are within 5% error of 12.8 floz in 20 seconds . . . 16 of 40 You’re Good To Go!

  17. 2nd Step – Actual Flow Rate Required flow rate is 0.3 GPM But if you are NOT within 5% of your required flow rate then . . . You actually collect 8.5 floz in 20 sec  0.2 GPM 17 of 40

  18. 3nd Step – Adjust Flow Rate Speed GPM = x x MPH GPA W 5940 18 of 40

  19. 3nd Step – Adjust Flow Rate Speed x GPM 5940 MPH = W x GPA 19 of 40

  20. 3nd Step – Adjust Flow Rate Speed x 0.2 GPM 5940 MPH = 15 inches x 15 GPA 20 of 40 5.3 MPH

  21. 3nd Step – Adjust Flow rate Speed GPA GPM = MPH x x GPA W 5940 21 of 40

  22. 3nd Step – Adjust Flow rate Speed GPA x 0.2 GPM 5940 GPA = 15 inches x 8 MPH 22 of 40 10 GPA This is below the label 15 to 20 GPA rate range

  23. 4th Step – Amount to Add • You must know: • The product rate • The required spray rate (GPA) • Tank capacity of or field size 23 of 40

  24. 4th Step – Amount to Add • 500-gallon tank • Sprayer is calibrated at 20 GPA • 32 floz Glyphosate 41 per acre How much of Glyphosaste 41 do you add to the tank? 24 of 40

  25. 4th Step – Amount to Add • Step 1: how many acres will each tankful spray Acres per = 500-gal tank = 25 acres tank 20 GPA 25 of 40

  26. 4th Step – Amount to Add to a Full Tank • Step 2: how much Glyphosate 41 to add to each tank? Product per = 25 acres x 32 floz/A tank = 800 floz  6 gal + 2 pt 26 of 40

  27. 4th Step – Amount to Add to a Partial Tank • 15-acre field • Sprayer is calibrated at 20 GPA • 12 floz/A of Headline fungicide How much of Headline do you add to the tank? 27 of 40

  28. 4th Step – Amount to Add Partial Tank • Step 1: how much water to add to the tank? Water per = 15 acres x 20 GPA tank = 300 gals of mix 28 of 40

  29. 4th Step – Amount to Add to a Partial Tank • Step 1: how much Headline? Product per = 15 acres x 12 flozper acre tank = 180 floz  1 gal + 3.2 pt 29 of 40

  30. 4th Step – Adjuvant Rates • Rate expressed as product per Acre • Rate expressed as a percentage Amount needed = product rate x acres = 2 pts crop oil x 16 acres = 32 pts (4 gals) Amount needed = percentage x gals spray mix = 0.25% x 250 gals 100 = 0.625 gals adjuvant  5 pts 30 of 40

  31. Calibrating your Granular Applicator 31 of 40

  32. Granular Applications – Ounces per 1000 ft of row 30” row  2.5 ft  43560 ft2 = 17,424 ft long 2.5 ft for an acre 32 of 40 2.5’ 17,424 ft

  33. Granular Applications – Ounces per 1000 ft of row 1000 ft x 8.8 lbs = 0.5 lb 8 ozs per 17, 424 ft 1000 ft 33 of 40 2.5’ 17,424 ft

  34. Granular Applications – Ounces per 1000 ft of row • Step 1: Mark a distance of 1,000 feet in the field • Step 2: Adjust each hopper unit to recommended settings • Step 3: Ready the hopper units for measuring output • Step 4: Drive the measured distance 34 of 40

  35. Granular Applications – Ounces per 1000 ft of row • Step 5: Weigh material from each unit Unit 1 2 3 4 5 6 7 8 Weight (ounces) 8.2 8.4 7.6 7.9 8.1 8.2 8.6 6.0 35 of 40

  36. Granular Applications – Ounces per 1000 ft of row • Step 6: Adjust units not within 5% of the recommended rate of 8 oz Five percent of 8 ounces is: 8 ounces x .05 Recalibrate units whose output is: less than 7.6 ounces or greater than 8.4 ounces 36 of 40

  37. Granular Applications – Ounces per 1000 ft of row • Step 5: Weigh material from each unit Unit 1 2 3 4 5 6 7 8 Weight (ounces) 8.2 8.4 7.6 7.9 8.1 8.2 8.6 6.0 Acceptable Range in output7.6 – 8.4 ounces 37 of 40 X X

  38. Why calibrate, I have one of these? 38 of 40

  39. Why calibrate I have one of these? • It is always a good idea to check: • Equipment wears out • Equipment can be off • Constants in the computer may be wrong • Slippage can lead to the wrong speed • And . . . 39 of 40

  40. Why not make sure it is working? The gizmo said to turn RIGHT! What DID you do Father!?! 40 of 40 GPS Gone Wrong!

  41. Calibrating your Spray equipment Pesticide Applicator Training (608) 262-7588 PATPROGRAM@WISCMAIL.WISC.EDU HTTP://IPCM.WISC.EDU/PAT Main Menu

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