Sheep Blowfly Forecasting Systems

Blowfly strike forecasting systems help sheep farmers anticipate high-risk periods and time preventive treatments more effectively, improving welfare while supporting responsible chemical use.

Key Facts

NADIS Parasite Forecast and similar tools use weather data to predict blowfly strike risk levels
High temperatures and humidity create conditions of elevated blowfly activity and strike risk
Dagginess, fleece soiling, and wounds dramatically increase individual sheep susceptibility
Preventive insecticide treatment timing can be aligned with forecast risk periods rather than calendar schedules
Strike in hidden locations including under the fleece can be advanced before external signs are obvious

Welfare Considerations

Blowfly strike causes intense suffering - maggots release enzymes that liquefy tissue, causing pain, toxaemia, and death if undetected. Forecasting systems enable farmers to apply preventive treatments when risk is genuinely elevated rather than on fixed calendar schedules, reducing chemical use while maintaining welfare protection. Combining forecasting with reduced susceptibility management (dagging, crutching, wound treatment) creates the most effective welfare protection.

What You Can Do

Use blowfly strike forecasting systems to guide preventive treatment timing
Reduce individual sheep susceptibility through dagging, crutching, and wound management
Inspect sheep frequently during high-risk weather conditions for early strike detection
Learn to recognise early blowfly strike signs requiring immediate treatment