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Jetting

Jetting is a useful tool for applying chemicals to protect sheep during periods of high flystrike risk. It can be done by hand jetting or by using an automatic jetting race.

The following pages provide video and detail on:

The table below summarises the advantages and disadvantages of hand jetting and automatic jetting races.


Technique

Advantages

Disadvantages

Hand jetting

  • With good technique, hand jetting is the most thorough long wool flystrike treatment
  • Flystrike protection provided by jetting products is likely to be greater when applied by hand jetting
  • Slow, hard work
  • Thoroughness of the method declines as the operator tires
  • Can leave high residues in the fleece
  • Requires operator to wear good quality, comfortable personal protective equipment
  • Requires access to water, concrete-floored race and good jetting equipment including pump
  • Jetting handpieces vary in their efficiencies
  • Operator must dilute concentrate with water
  • There is a need to dispose of spent/unused jetting fluid

Automatic jetting race

  • Faster than hand jetting
  • Less work for the operator than hand jetting
  • Removes the need for the operator to stand in the race with the sheep
  • If set up and operated efficiently it can allow the operator to stand back from the machine thereby reducing exposure to insecticides
  • Automatic jetting races vary in their efficiencies
  • Requires access to a properly functioning automatic jetting race and adequate pump
  • Automatic jetting races need to be set up and adjusted to the size of the sheep
  • Requires access to water
  • Can leave higher residues in the fleece than hand jetting
  • Operator must dilute insecticide concentrate with water
  • Results in operator exposure to spray when moving stalled sheep
  • There is a need to dispose of spent/unused jetting fluid

Hand-jetting using a Dutjet wand. Source: Peter James, DEEDI.
Hand-jetting using a Dutjet wand. Source: Peter James, DEEDI.
Sickle wand. Source: Garry Levot, NSW DPI.
Sickle wand. Source: Garry Levot, NSW DPI.
Dutjet wand. Source: Garry Levot, NSW DPI.
Dutjet wand. Source: Garry Levot, NSW DPI.