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9_Efficient_Knapsack_Sprayer_Use.ppt

9_Efficient_Knapsack_Sprayer_Use.ppt

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Efficient Knapsack Sprayer Use
1 of 15
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Efficient knapsack sprayer use - overview
• To get the maximum benefits from the use of any crop protection
product, as well as reducing risks of any potential human or
environmental contamination, it is important to apply the product in
the optimum way.
• Best maintenance, calibration and use of the knapsack are critical to
the success of any application and will ensure that you get
maximum value, effect and safety from the products used.
• This guide for efficient knapsack use gives tips on the key points of
maintenance, calibration and use of knapsack sprayers.
2 of 15
www.stewardshipcommunity.com
Four steps to good knapsack spraying
1. Check sprayer for leaks with clean water (always before use)
2. Calibrate sprayer output (at least once per season)
3. Ensure an even and uniform application
4. Clean sprayer after each use
3 of 15
www.stewardshipcommunity.com
Your 4 steps to good knapsack spraying:
(on a laminated sheet)
4 of 15
www.stewardshipcommunity.com
Efficient knapsack sprayer use – key points
Best spraying practices - practice using
just water if not sure
– Steady forward speed
– Even spray height
– Constant pressure
Calibrate
– Correct product dose
– Correct water volume
– Correct nozzle
Clean and well maintain equipment
5 of 15
www.stewardshipcommunity.com
Efficient knapsack sprayer use: check, double check and
keep it clean
1. Check sprayer with clean water
Check spray
pattern
Clean nozzles
with brush
Check for
damage and
leaks
Check straps
Clean nozzles
and filters
6 of 15

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9_Efficient_Knapsack_Sprayer_Use.ppt

  • 2. www.stewardshipcommunity.com Efficient knapsack sprayer use - overview • To get the maximum benefits from the use of any crop protection product, as well as reducing risks of any potential human or environmental contamination, it is important to apply the product in the optimum way. • Best maintenance, calibration and use of the knapsack are critical to the success of any application and will ensure that you get maximum value, effect and safety from the products used. • This guide for efficient knapsack use gives tips on the key points of maintenance, calibration and use of knapsack sprayers. 2 of 15
  • 3. www.stewardshipcommunity.com Four steps to good knapsack spraying 1. Check sprayer for leaks with clean water (always before use) 2. Calibrate sprayer output (at least once per season) 3. Ensure an even and uniform application 4. Clean sprayer after each use 3 of 15
  • 4. www.stewardshipcommunity.com Your 4 steps to good knapsack spraying: (on a laminated sheet) 4 of 15
  • 5. www.stewardshipcommunity.com Efficient knapsack sprayer use – key points Best spraying practices - practice using just water if not sure – Steady forward speed – Even spray height – Constant pressure Calibrate – Correct product dose – Correct water volume – Correct nozzle Clean and well maintain equipment 5 of 15
  • 6. www.stewardshipcommunity.com Efficient knapsack sprayer use: check, double check and keep it clean 1. Check sprayer with clean water Check spray pattern Clean nozzles with brush Check for damage and leaks Check straps Clean nozzles and filters 6 of 15
  • 7. www.stewardshipcommunity.com Efficient knapsack sprayer use: repair leaks immediately • Fix all leaks before using the sprayer • Know where leaks are most likely to occur • Keep spare parts to repair leaks 7 of 15
  • 8. www.stewardshipcommunity.com 2. Calibrate sprayer output • Read product label • Follow calibration instructions • Fit appropriate nozzle • Measure swath width • Adjust water volumes (l/ha) within recommended limits to your specific needs such as stage of crop growth Efficient knapsack sprayer use: calibration See “Calibration of Hand Held Sprayer Equipment” training module for more detailed information 8 of 15
  • 9. www.stewardshipcommunity.com Efficient knapsack sprayer use: use best field practices 3. Application Keep constant height Wear appropriate protective clothing Avoid water contamination Spray downwind and avoid drift 9 of 15
  • 10. www.stewardshipcommunity.com Efficient knapsack sprayer use: cleaning is critical 4. Cleaning of sprayer after use Clean sprayer inside and out Triple rinse Spray washings back onto crop Avoid contaminating water sources 10 of 15
  • 11. www.stewardshipcommunity.com Efficient knapsack sprayer use: choosing nozzle type See „Nozzle Selection“ training module for more details Three main nozzle designs are used on knapsack sprayers. Each nozzle design is available in a range of sizes to optimise use of product to be applied. 11 of 15
  • 12. www.stewardshipcommunity.com Efficient knapsack sprayer use: choosing nozzle type • A range of nozzles are available, to meet the needs of contrasting products, for applying differing water volumes as well as differing droplet sizes and distribution patterns • Selecting nozzle type and size is critical: for water volume rates (l/ha), drop size and distribution • Drop size used may affect activity of the product applied and safety; smaller droplets can cause spray drift • Water volumes used must not be too high to lead to product waste through run off or too low to not adequately cover all target surfaces 12 of 15
  • 13. www.stewardshipcommunity.com Efficient knapsack use: best practices summary Best practices • Steady forward speed • Even spray height • Constant pressure • Calibrate • Correct dose • Clean equipment 13 of 15
  • 14. www.stewardshipcommunity.com Questions 1. What are the 4 steps to efficient knapsack use? 2. Using the dosing wheel, tell me how much product you would require to add to a 20l knapsack if the calibrated output is 300l/ha and the product rate is 1.5l/ha? 3. To calibrate a knapsack, what information is required prior to checking the sprayer output? 4. Which is the best way to increase or decrease application volume? 5. Demonstrate that you can calibrate a knapsack and determine the application volume. 6. Where are leaks most likely to occur on a knapsack sprayer? 14 of 15
  • 15. www.stewardshipcommunity.com Trainer notes 1. Ensure there are sufficient knapsacks to allow trainees to work in teams of 2 or 3 to calibrate sprayers. 2. Check availability of field space to allow for realistic calibration practice. 3. Use water sensitive paper, if necessary, to demonstrate swath width. If not, then use dry concrete surfaces. 4. Have sufficient laminated sheets, calibration cards and Kalibottles (if used) for each participant. 5. Fit knapsacks with different nozzles to demonstrate different flow rates, drop sizes and spray patterns. 6. Use water sensitive paper to show different spray patterns from a range of nozzles. 15 of 15