Compact Field Sprayers by Rapid Spray
Rapid Spray Marshal Pro Operators Handbook
8
SPRAYING
For effective spraying, ensure you have taken the following factors into account.
1.
Before commencing spraying, plan the work effectively to reduce potential
contamination.
2.
Do not spray if the operator, bystanders, watercourses or any non-target vegetation
appears to be in danger from spray drift contamination.
3.
Work Rates
•
Speed of operation
•
Water points or nurse tanks
•
Rate of travel
•
Swath width
•
Spray volume applied
4.
Wind and drift
•
Wind speed
•
Wind direction
•
Airspeed at boom height
•
Wind direction and drift is controlled by;
»
Reducing nozzle height
»
Reducing pressure and using larger nozzles
»
Fit low-drift nozzles producing larger droplets
NOTE:
Avoid spraying on still warm days or during the night as convection currents may
cause drift in unpredictable directions. Optimum wind speeds are between 3km/h to
7km/h.
5.
Field Work (for use with boom attachment - see diagram on page 9)
•
Swath marking and spraying
•
Mark out to ensure proper pass matching - use flags, foam markers or tram-lines
•
Where large obstacles exist in the middle of an area to be sprayed, mark out and
spray the area like a separate headland.
•
The perimeter of the field should be sprayed first. The width of two swaths will give
adequate turning space at the ends of spray runs.
•
Never spray while turning.
6.
Maintain constant speed when spraying. Should you need to increase your spraying
speed, larger delivery nozzles must be fitted. Re-calibrate as required.
