Avenge contains Imidacloprid, a neonicotinoid insecticide that kills blowfly maggots and lice quickly by affecting their nervous system, resulting in insect paralysis and death. Avenge provides protection against flystrike in both short wool (up to 7 days off shears) and long wool (6 weeks to 8 months) as well as 100% knockdown and control of susceptible lice offshears.

Avenge applied off shears provides dual action of up to 10 weeks protection against flystrike as well as lice control. One application controls both pests at this time freeing the producer to concentrate on other things. Avenge also provides the producer flexibility. When applied in long wool, Avenge provides up to 14 weeks protection against flystrike.

 Avenge controls susceptible body lice (Bovicola ovis) when applied to shorn sheep up to 7 days off shears and unshorn lambs up to 2 months of age. Avenge has a four week residual activity for lice (when applied within 24 hours off-shears), offering the best protection against re-infestation for complete peace of mind. It will continue to kill any lice that hatch from eggs following treatment and protect sheep from reinfestation from stray sheep or other lousy sheep for up to four weeks. If you find a few strays, shear the strays as soon as possible and treat them with Avenge, and quarantine them for 4 weeks. Avenge also offers up to 10 weeks protection against fly strike off shears.

Product Benefits

  • Provides up to 10 weeks protection against fly strike off shears
  • Provides up to 14 weeks protection against fly strike in long wool
  • AVENGE is the only knockdown, pour-on lice treatment with 4 weeks residual protection
  • 100% knockdown efficacy to kill lice fast, including strains resistant to other chemical classes
  • Flexible - can be applied up to 7 days after shearing
  • Safe to use on unshorn lambs up to 2 months of age
  • Rainfast - tested in various rainfall conditions and proven itself effective on sheep that have been rained on - before and after treatment
  • Provides up to 10 weeks protection against fly strike off shears
  • High volume dose for better coverage and spread
  • No need to keep sheep penned after application
  • Easy application using a Bayer Avenge manual or compressed air/gas (Power Doser) applicator

Directions for Use

1.      Flystrike prevention in long wool

Use the custom designed Bayer spray-on applicator gun. Avenge for fly control
in long wool can be used on all sheep from 13 kg bodyweight upwards with
between 6 weeks and 8 months wool. For body strike prevention, apply in two
bands down the backline from the poll to tail butt, one on either side of the
sheep. Ensure the bands overlap along the midline. For prevention of breech
strike apply a single band to the breech area. The applicator nozzle should be
15-20 cm above the fleece to ensure even distribution of the product.

2.      Dual Action Flystrike prevention and Lice
control in short wool

Apply Avenge as a double broad-band stripe in adult sheep or as a single band
in younger sheep under 30kg bodyweight (according to the dose rate and
application pattern below)

Add 10mL for each 10kg above 100kg bodyweight.

Correct application is vital. Incorrect application may affect product efficacy. Inspect sheep prior to release from the race and if the dose is incorrectly applied, re-treat as per the correct application pattern.

Withholding Periods

MEAT: DO NOT USE less than 21 days before slaughter for human consumption.

MILK: DO NOT USE on female sheep which are producing, or may in the future produce, milk or milk products for human consumption.

WOOL: DO NOT USE less than 2 months before shearing or fibre collection.

EXPORT SLAUGHTER INTERVAL (ESI): DO NOT slaughter for export less than 63 days after treatment.

Pack Size


One 20L pack will treat 333 sheep (30.1 - 55kg body weight).