Elanco’s Blowfly Watch service is back open for the 2025 season, providing updates on the risk of blowfly strike across the UK.
In partnership with NADIS, the tool is designed to keep vets and their farm clients informed of the strike risk level in their area, helping to prevent cases before they arise.
“Blowfly Watch was a useful asset to the sheep industry last year, and we hope it plays an even greater role in supporting vets to help their clients prevent strike this season,” he said.
“Historically, cases have been seen from March to September, but mild winters are now extending the threat into October and beyond,” he explained.
“We can no longer just rely on past experience to determine when to take preventative action.”
With losses as high as £209 per lamb and £184 per breeding ewe reported in 2023, blowfly strike is an ever-growing concern for both animal welfare and economic viability.
About the service
Blowfly Watch uses a model by Prof Richard Wall, from the University of Bristol, to collate daily Met Office risk factors including soil temperature and humidity, along with a detailed understanding of fly biology and sheep susceptibility to generate localised alerts.
“For vets, Blowfly Watch provides a valuable resource to guide farmers on preventative measures, with regular email updates informing timely prophylactic treatment,” said Mr Colston.
When advising on appropriate treatments, he recommends Insect Growth Regulators (IGRs), such as those in the CLiK range, to protect flocks throughout the peak season.
“CLiK products can provide up to 19 weeks of protection, offering farmers reassurance that flocks are covered during the peak season,” he said.
However, Mr Colston adds that ensuring the product is being applied correctly is critical for efficacy.
“I always advise farmers to use the four-stroke application method to ensure a consistent application to get the full fleece protection we’re looking for,” he said.
Mr Colston added that as trusted advisors, vets can play a key role in safeguarding flock health.
