2. Calibration 2014 Wisconsin Pesticide Applicator Training Program University of Wisconsin Extension 1 of 40

3. Calibration 2014 Purpose of Calibration To deliver the correct rate of pesticide AND Apply it uniformly over the target area Photo source: Syngenta 2 of 40

4. Calibration 2014 Purpose of Calibration Errors can lead to crop injury or loss of money 3 of 40

5. Calibration 2014 Mini-Sprayers and Pattern Each nozzle is a “mini-sprayer” 1. Nozzle/boom height 2. Nozzle angle 3. Nozzle spacing 4 of 40

6. Calibration 2014 Spray Rate 1.Nozzle flow rate 2.Speed of travel 5 of 40

7. Calibration 2014 Spray Rate – Nozzle Flow Rate 1.Nozzle flow rate 2.Speed of travel Pressure OK for small adjustments Have to increase 4x to double output 6 of 40

8. Calibration 2014 Spray Rate – Nozzle Flow Rate 1.Nozzle flow rate 2.Speed of travel For larger changes in output, consider changing the nozzle Gallons per minute - GPM XR 80 0380 degree angle 0.3 GPM at 40 psi 7 of 40

9. Calibration 2014 Spray Rate – Speed of Travel 1.Nozzle flow rate 2.Speed of travel One to one Speed up put less out Easy way to make changes 8 of 40

10. Calibration 2014 Spray Rate – Speed of Travel 1.Nozzle flow rate 2.Speed of travel Speed (MPH) = distance in feet x 0.68 time in seconds 9 of 40

11. Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 10 of 40

12. Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 11 of 40

13. Calibration 2014 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

14. Calibration 2014 The 4 steps to Calibration 4. Determine how much pesticide and water to add to the tank 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate

15. Calibration 2014 1 st 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

16. Calibration 2014 1 st Step – Determine Flow Rate GPM = MPH x GPA x W 5940 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 = 8 MPH x 15 GPA x 15 5940 GPM = 0.3 This is your “required” flow rate 15 of 40

17. Calibration 2014 2 nd Step – Actual Flow Rate Required flow rate is 0.3 GPM If all your nozzles are within 5% error of 12.8 fl oz in 20 seconds... 16 of 40

18. Calibration 2014 2 nd 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 fl oz in 20 sec  0.2 GPM 17 of 40

19. Calibration 2014 3 nd Step – Adjust Flow Rate 1.Speed GPM= MPH x x GPA W 5940 18 of 40

20. Calibration 2014 3 nd Step – Adjust Flow Rate 1.Speed MPH= W x GPA 5940 xGPM 19 of 40

21. Calibration 2014 3 nd Step – Adjust Flow Rate 1.Speed MPH= 15 inches x 15 GPA 5940 x0.2 GPM 5.3 MPH 20 of 40

22. Calibration 2014 3 nd Step – Adjust Flow rate 1.Speed 2.GPA GPM= MPH x x GPA W 5940 21 of 40

23. Calibration 2014 3 nd Step – Adjust Flow rate 1.Speed 2.GPA GPA= 15 inches x 8 MPH 5940 x0.2 GPM 10 GPA This is below the label 15 to 20 GPA rate range 22 of 40

24. Calibration 2014 4 th Step – Amount to Add You must know: The product rate The required spray rate (GPA) Tank capacity of or field size 23 of 40

25. Calibration 2014 4 th Step – Amount to Add 500-gallon tank Sprayer is calibrated at 20 GPA 32 fl oz Glyphosate 41 per acre 24 of 40

26. Calibration 2014 4 th 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

27. Calibration 2014 4 th 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 fl oz/A tank = 800 fl oz  6 gal + 2 pt 26 of 40

28. Calibration 2014 4 th Step – Amount to Add to a Partial Tank 15-acre field Sprayer is calibrated at 20 GPA 12 fl oz/A of Headline fungicide 27 of 40

29. Calibration 2014 4 th 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

30. Calibration 2014 4 th Step – Amount to Add to a Partial Tank Step 1: how much Headline? Product per = 15 acres x 12 fl oz per acre tank = 180 fl oz  1 gal + 3.2 pt 29 of 40

31. Calibration 2014 4 th 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

32. Calibration 2014 31 of 40

33. Calibration 2014 Granular Applications – Ounces per 1000 ft of row 30” row  2.5 ft  43560 ft 2 = 17,424 ft long 2.5 ft for an acre 2.5’ 17,424 ft 32 of 40

34. Calibration 2014 Granular Applications – Ounces per 1000 ft of row 2.5’ 17,424 ft 1000 ft x 8.8 lbs = 0.5 lb  8 ozs per 17, 424 ft 1000 ft 33 of 40

35. Calibration 2014 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

36. Calibration 2014 Granular Applications – Ounces per 1000 ft of row Step 5: Weigh material from each unit Unit12345678 Weight (ounces)8.28.47.67.98.18.28.66.0 35 of 40

37. Calibration 2014 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

38. Calibration 2014 Granular Applications – Ounces per 1000 ft of row Step 5: Weigh material from each unit Unit12345678 Weight (ounces)8.28.47.67.98.18.28.66.0 X X Acceptable Range in output 7.6 – 8.4 ounces 37 of 40

39. Calibration 2014 Why calibrate, I have one of these? 38 of 40

40. Calibration 2014 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

41. Calibration 2014 Why not make sure it is working? GPS Gone Wrong! What DID you do Father!?! The gizmo said to turn RIGHT! 40 of 40

42. Calibration 2014 Main Menu