Be prepared for preventing blowfly strike

Early prevention of blowfly strike is essential to taking control and reducing health and welfare losses. Be prepared by receiving Blowfly Watch Alerts and checking the Blowfly Risk Forecast and prevent blowfly strike in your flock.

Blowfly Watch Alerts

Our Blowfly Watch email alerts provide sheep farmers with timely, targeted insights into the level of blowfly risk in the farm's area, so you can prevent blowfly strike in your sheep with early preventative treatment.

Blowfly Risk Forecast

Developed in conjunction with NADIS, the blowfly risk forecast uses Met Office weather data to predict the emergence of blowflies and therefore the level of risk relating to the number of animals which might be affected by blowfly strike within 40km2 grids across the UK.

Level of national risk of blowfly strike: 

Current risk: High

The NADIS blowfly forecast suggests that weather conditions across all parts of the UK mean that local flocks may be at HIGH RISK of blowfly strike caused by female flies being active and laying eggs. Note that local on farm conditions can pose higher or lower risks.

Carcasses, dirty backends, foot rot lesions and open wounds are all attractive egg laying sites. Strike can develop very quickly, with the first maggots appearing within 12 hours of eggs being laid.

Be prepared: It is crucial to plan to protect animals against flystrike.

Check the number of strikes reported with our Blowfly Tracker.

Check the level of blowfly risk in your area:

Strike first against blowfly

Blowfly strike control in sheep

Strike first!

Prepare your blowfly control strategy with the CLiK portfolio of products.

Elanco blowfly tracker for reporting blowfly strikes

Seen blowfly strike?

Report a case of blowfly strike to track this on our blowfly tracker.

Elanco blowfly tracker for reporting blowfly strikes

Check strikes reported

Check the number of strikes reported in your county using the Blowfly Tracker

Sources and acknowledgements

The model used to generate these predictions uses Met Office recordings of daily temperatures and rainfall, along with a detailed understanding of fly biology and sheep susceptibility to strike, to forecast the patterns of strike incidence. The model is highly accurate and tests have shown that it can effectively explain patterns of strike in sheep flocks1,2.

The risk level relates to the number of affected sheep expected collectively for all flocks in a region – and the expectation is that most of these sheep would be treated. If sheep were all untreated, incidences would be about 10x higher than the predictions. Each predicted strike level relates to the period from one update to the next.

Risk data provided by Professor Richard Wall BSc, MBA, PhD from the University of Bristol.

  1. Wall et al, 2000, Sheep blowfly strike: a model approach. Res Vet Sci, 69, 1-9.
  2. Wall et al, 2002, Development and validation of a simulation model for sheep blowfly strike. Med Vet Entomol., 16, 335-346