ParaBoss: Australia’s resource for control of worms, flies and lice in sheep, and worms in goats

ParaBoss offers the current, nationally endorsed, management recommendations for worm, flystrike and lice control via three websites: WormBoss, FlyBoss and LiceBoss.

  • WormBoss provides the procedural information to make an integrated worm control program simple and practical.
  • Use the WormBoss website as your reference for all worm control information, including drenches, management and testing.

Worms are the major health issue for sheep in the moderate and higher rainfall areas of Australia. As such, integrated worm control programs are required in these areas as they are far more effective and sustainable than reliance on drenching, but they require some procedural knowledge to be done correctly.

An integrated program combines grazing management, breeding for resistance, worm testing and drench testing with drenching. This provides more ways to reduce worm burdens and to slow their build-up, so that a shortfall in one method is unlikely to cause failure of a program, which can occur if only one strategy, such as drenching, is used.

The WormBoss Worm Control Programs and Drench Decision Guides make implementation of an integrated program relatively simple on most properties. They provide ‘what to do and when to do it’, straightforward, practical, procedural information for producers.

The Drench Decision Guides come in a downloadable or interactive web version that assist with the day-to-day timing of when mobs should be drenched and provide recommendations on whether a long-acting drench is warranted and when to check the mob again.

  • FlyBoss provides information and tools to determine the most effective program for your region and your flock.
  • Use the FlyBoss website and strategic planning tools to develop an integrated approach to controlling flystrike

Flystrike ­­­­is a major health issue for sheep—second only to worms—across all rainfall zones of Australia. Integrated breeding and management strategies for flystrike control are the most effective.

An integrated program for control of flystrike combines both breeding and management approaches, which together greatly reduce the overall risk of a program failure, as the chance of a number of methods failing simultaneously is far less likely.

FlyBoss provides information on how to solve your current flystrike problem and to prepare a flystrike management plan. It also provides a range of interactive decision-support tools that allow you to:


Optimise Treatment identify when your sheep are most at risk of strike, based on shearing and crutching time and the normal long term weather pattern for your region, and to optimise the time of treatment
Compare Management compare management systems with different shearing and crutching schedule and different chemical protective treatment or different breech modification alternatives.
Products check products available for control of flystrike (or lice), active ingredients, method of application, withhold periods, approximate costs, etc.
WoolRes estimate the pesticide residue levels cause by lice or flystrike treatments.

The tools provide information based on climatic conditions in your local region and the characteristics of your flock, which is important in tailoring a strategic flystrike control approach unique to your property.

  • Use the LiceBoss website as your reference for all lice control information, including treatments, prevention, management and monitoring

Lice remain one of the top health issues for sheep producers. Even after lice have gone from a property there is the ever-present threat of a new incursion.

LiceBoss provides technical information for monitoring, preventing and treating lice; lice biology and economic effects and on resistance, residues and safety of treatments. It also provides a series of interactive decision support tools which allow you to enter farm specific data and get answers applicable to your property and particular management circumstances.

  • Products Tool: registered products for lice and flystrike control.
  • Ewe-lamb Treatments Tool: treatment strategies for pregnant ewes or ewes that have lambs at foot.
  • Long Wool Tool: for determining the best course of action when lice are found more than 6 weeks after shearing.
  • Treatment Tool: assesses dipping, showering and backline application methods and helps to identify faults in technique and possible causes of a treatment failure.
  • Rubbing Tool: determines whether rubbing is likely to be due to lice or some other cause.
  • Short Wool Tool: assists in deciding whether to treat for lice at, or soon after, shearing. It can also help identify potential sources of infestation and assist the design of a lice biosecurity plan.
  • Wool Residue Tool: estimates the pesticide residue concentration likely in the wool at the next shearing after application of chemicals for lice or flystrike control.