Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Pesticide Application Equipment
and Safety
Prepared by Aggrey Atuhaire
atuagrey3@gmail.com , +256-779864929
Pesticide application equipment
(examples)
lever-operated sprayers compression sprayers
Equipment examples….
Motorised sprayer Handheld sprayer
Lever-operated knapsack (LK)sprayer
WHAT SHOULD WE CONSIDER WHEN
BUYING AN LK SPRAYER?
BUYING LK knapsack sprayer
Handle for carrying
Easy re-fit of straps
Non-absorbent material
Grip for final adjustment of s...
BUYING LK knapsack sprayer
Air vent lid
-Possible to shift lever to other
side of tank
-Access to shift broken
diaphragm
-...
BUYING LK knapsack sprayer
Strainer for filling  -IN-line strainer 
-Easy access for strainer cleaning 
BUYING LK knapsack sprayer
Possible to set for high or low maximum
Pressure / pressure relief valve
Standard cone nozzle a...
BUYING LK knapsack sprayer
Possible to lock in off (and on) position
In line strainer – fixed to hose
BUYING LK knapsack sprayer
Possible to read tank contents?
BUYING LK knapsack sprayer
Easy splash-free water filling  Leaking from lid and pump !
Operator Safety and Environmental
requirements
(what do international standards say?)
Examples of safety hazards for
knapsack sprayers
• Getting fingers caught between lever and
frame
• Cuts from sprayer part...
Sources of environmental hazards for
knapsack sprayers
• Leakages
• Controls
• Filling and emptying
• Application rates
• ...
ISO 19932 (2013) Safety and
Environmental requirements
• GENERAL
- all functions possible for operator wearing
protective ...
ISO 19932 requirements….
• HARNESS
- adjustable
- quick release (double shoulder)
- non absorbent material
- shoulder stra...
ISO 19932 requirements….
• SPRAY TANK
- contents gauge accuracy
- material UV light resistant
- filling opening at least 1...
ISO 19932 requirements….
•HOSES
- at least 1200 mm long
- no sharp bends
•FILTERS
- filling filter with 0.5 to 2 mm mesh w...
ISO 19932 test methods
• Functional tests
- shut-off device reliability
- spray liquid output
- strap drop test
- inclinat...
Tests
Strap test failures
Broken hooks
Broken fixing point
Personal Protective Equipment (PPE)
use in pesticide application
!
!!!!!
!!!
Protective suit contamination after using LK
sprayer (source: King and Dobson, 1992)
NOZZLES
Herbicides
Reflex
Hollow coneFlat fan
Fungicides,
Insecticides
Nozzle choice
Types Pressure Spray Advantages
(bar) quality
Reflex 1 Coarse Wide angle / less drift
Hollow cone 3 Fine Good coverage
Fla...
CALIBRATION
What is calibration?
• Calibration means testing your spraying
equipment with water and measuring how
much it can apply on...
How is calibration done?
• Method 1: Tank method
• Method 2: Kalibottle method
CALIBRATING LK knapsack sprayer
Tank method
Add clean water up to a recognizable mark
CALIBRATING LK knapsack sprayer
Tank method
20 m
5 m
Spray a given measured area
CALIBRATING LK knapsack sprayer
Tank methodAfter spraying the given area;
Fill measuring jug
to top mark
Add water till yo...
CALIBRATING LK knapsack sprayer
Tank method
Therefore l used for spraying 100 sqm x 100 = l/ha
Calculate l/ha based on the...
CALIBRATING LK knapsack sprayer
Finding the chemical dose rate with
the Syngenta wheel:
A: calibrated l/ha to be aligned w...
CALIBRATING LK knapsack sprayer
Using formulas to find out how much chemical to add per tank full:
Pesticide dose rate (ml...
CALIBRATING LK knapsack sprayer
Kalibottle method
1. Use a clean sprayer with clean water
2. Check sprayer works correctly...
CALIBRATING LK knapsack sprayer
KALIBOTTLE method
CALIBRATING LK knapsack sprayer
KALIBOTTLE method
Walking – “spraying” 25 sqm
Reading “l/ha”
Repeat to be sure “
In summary (kalibottle method)
1. Fill the knapsack spray tank to maximum rated capacity with clean
water.
2. Set the corr...
……..
5. Measure out the required distance to enable you to spray 25
or100m2
(this should preferably be done in the intende...
END
Aggrey Atuhaire
Agric. Coordinator
PHE Uganda Project/UNACOH
Pesticide application equipment
Upcoming SlideShare
Loading in …5
×

Pesticide application equipment

Farmers' guide on choice and safe use of pesticide application equipment

  • Login to see the comments

Pesticide application equipment

  1. 1. Pesticide Application Equipment and Safety Prepared by Aggrey Atuhaire atuagrey3@gmail.com , +256-779864929
  2. 2. Pesticide application equipment (examples) lever-operated sprayers compression sprayers
  3. 3. Equipment examples…. Motorised sprayer Handheld sprayer
  4. 4. Lever-operated knapsack (LK)sprayer
  5. 5. WHAT SHOULD WE CONSIDER WHEN BUYING AN LK SPRAYER?
  6. 6. BUYING LK knapsack sprayer Handle for carrying Easy re-fit of straps Non-absorbent material Grip for final adjustment of straps
  7. 7. BUYING LK knapsack sprayer Air vent lid -Possible to shift lever to other side of tank -Access to shift broken diaphragm -Drainage holes in base
  8. 8. BUYING LK knapsack sprayer Strainer for filling  -IN-line strainer  -Easy access for strainer cleaning 
  9. 9. BUYING LK knapsack sprayer Possible to set for high or low maximum Pressure / pressure relief valve Standard cone nozzle and seal – plus different nozzle types Wide range of nozzles can be fitted in nozzle holder
  10. 10. BUYING LK knapsack sprayer Possible to lock in off (and on) position In line strainer – fixed to hose
  11. 11. BUYING LK knapsack sprayer Possible to read tank contents?
  12. 12. BUYING LK knapsack sprayer Easy splash-free water filling  Leaking from lid and pump !
  13. 13. Operator Safety and Environmental requirements (what do international standards say?)
  14. 14. Examples of safety hazards for knapsack sprayers • Getting fingers caught between lever and frame • Cuts from sprayer parts • Strain by heavy lift • Injury by bursting parts • Dermal contact, oral intake and inhalation of spray droplets or vapour • Tenseness, bad posture, premature tiredness
  15. 15. Sources of environmental hazards for knapsack sprayers • Leakages • Controls • Filling and emptying • Application rates • Distribution, deposition and drift • Loss during stoppage • Cleaning
  16. 16. ISO 19932 (2013) Safety and Environmental requirements • GENERAL - all functions possible for operator wearing protective gloves - not heavier than 25 kg - materials chemical resistant - avoid outside accumulation of liquid (max. 70 ml) - resistant to twice the maximum working pressure - no leakage
  17. 17. ISO 19932 requirements…. • HARNESS - adjustable - quick release (double shoulder) - non absorbent material - shoulder straps at least 25 mm or 50 mm (>10 kg) wide -Waist strap
  18. 18. ISO 19932 requirements…. • SPRAY TANK - contents gauge accuracy - material UV light resistant - filling opening at least 100 mm wide - nominal volume to be filled in within 60 s - complete drainage (50 ml) • CONTROLS - quick acting shut-off device (no unintentional opening, easy to unlock) - pressure regulator (adjustable or changeable)
  19. 19. ISO 19932 requirements…. •HOSES - at least 1200 mm long - no sharp bends •FILTERS - filling filter with 0.5 to 2 mm mesh width - easy to be changed and cleaned •SPRAY LANCE AND NOZZLES - spray lance at least 500 mm long - possible to mount standard nozzles - nozzle flow rate must not deviate by more than 10% from specification
  20. 20. ISO 19932 test methods • Functional tests - shut-off device reliability - spray liquid output - strap drop test - inclination test - contents gauge accuracy and total volume test - filling test - emptying test - absorbency test for straps - chemical resistance of materials - technical residue test - external deposit volume test - drop test • Pressure test • Leakage test • Center of gravity
  21. 21. Tests
  22. 22. Strap test failures Broken hooks Broken fixing point
  23. 23. Personal Protective Equipment (PPE) use in pesticide application
  24. 24. ! !!!!! !!!
  25. 25. Protective suit contamination after using LK sprayer (source: King and Dobson, 1992)
  26. 26. NOZZLES
  27. 27. Herbicides Reflex Hollow coneFlat fan Fungicides, Insecticides Nozzle choice
  28. 28. Types Pressure Spray Advantages (bar) quality Reflex 1 Coarse Wide angle / less drift Hollow cone 3 Fine Good coverage Flat fan: Even spray 2 Medium / Coarse Narrow angle Nozzle types
  29. 29. CALIBRATION
  30. 30. What is calibration? • Calibration means testing your spraying equipment with water and measuring how much it can apply on a given area when walking at a given speed using a given pressure and keeping the nozzle at a given height, so that one is able to know; How much water he/she will need How much chemical will be needed How many sprayer full tanks will be needed How much chemical to add per full tank
  31. 31. How is calibration done? • Method 1: Tank method • Method 2: Kalibottle method
  32. 32. CALIBRATING LK knapsack sprayer Tank method Add clean water up to a recognizable mark
  33. 33. CALIBRATING LK knapsack sprayer Tank method 20 m 5 m Spray a given measured area
  34. 34. CALIBRATING LK knapsack sprayer Tank methodAfter spraying the given area; Fill measuring jug to top mark Add water till you reach same content as before spraying How much water have you used for refill ?
  35. 35. CALIBRATING LK knapsack sprayer Tank method Therefore l used for spraying 100 sqm x 100 = l/ha Calculate l/ha based on the amount of water used for example100 m2 :
  36. 36. CALIBRATING LK knapsack sprayer Finding the chemical dose rate with the Syngenta wheel: A: calibrated l/ha to be aligned with B: kg or l/ha chemical dose rate Find C: sprayer capacity Read D: chemical dose to be added per tank full A B C D
  37. 37. CALIBRATING LK knapsack sprayer Using formulas to find out how much chemical to add per tank full: Pesticide dose rate (ml) = ml / tank Tanks / hectare Calibrated l/ha = Tanks / hectare L / tank full
  38. 38. CALIBRATING LK knapsack sprayer Kalibottle method 1. Use a clean sprayer with clean water 2. Check sprayer works correctly and safely 3. With correct nozzle height, measure swath width 4. Practise spraying at comfortable working speed and with correct nozzle height 5. Attach Kalibottle and hold vertical 6. Spray 25 square metre 7. Read off volume rate
  39. 39. CALIBRATING LK knapsack sprayer KALIBOTTLE method
  40. 40. CALIBRATING LK knapsack sprayer KALIBOTTLE method Walking – “spraying” 25 sqm Reading “l/ha” Repeat to be sure “
  41. 41. In summary (kalibottle method) 1. Fill the knapsack spray tank to maximum rated capacity with clean water. 2. Set the correct operating pressure. 3. Spray holding the nozzle at the required height and measure the swath width. 4. Using the calibration chart find out how far you must walk to cover 25 or100m2 Most nozzles have an optimum height of 50cms above the first intercepting surface
  42. 42. …….. 5. Measure out the required distance to enable you to spray 25 or100m2 (this should preferably be done in the intended spray area to provide a reliable walking speed). 6. Prime the sprayer and fill the tank to the maximum rated graduation line or if there is no line fill to the top. 7. Walking at an even speed spray the 25 or100m2 , recording the amount of time taken to complete the task (if you spray more than one row do not record the time taken turning at the end of each row). 8. Refill the sprayer to the same level as in step 6 recording the amount of water required. 9. Using the calibration chart find out the application volume per ha. 10. Record all the results on the calibration form. 11. Repeat steps 7 to 10 three times to ensure accuracy.
  43. 43. END Aggrey Atuhaire Agric. Coordinator PHE Uganda Project/UNACOH

×