Welcome to Farm Animal Health!

I confirm I am a farmer, Registered Animal Medicines Advisor (RAMA, formerly SQP) or veterinary professional, in the United Kingdom! 

Skip to main content

Managing blowfly strike in sheep

Blowflies can have a devastating effect on flock health and productivity. Plan your blowfly management strategy to protect your flock.

Blowfly strike control in sheep

Learn more about how to prevent and control blowflies, which products to use when, and the importance of correct application.

Sheep blowfly products

The Elanco blowfly control portfolio includes CLiK™ EXTRACLiK™ and CLiKZiN™ which, as Insect Growth Regulators (IGRs), stop larvae from developing into the harmful second and third stage maggots responsible for fly strike. These are the only products to benefit from FleeceBind™, a technology that allows the product to spread and bind to give full fleece protection*, minimising the risk of fly strike.

The portfolio is completed with Crovect™, a synthetic pyrethroid which treats and controls ticks, headflies, lice and blowfly. Dose rates and application vary depending on the parasite being treated.  

Crovect Pour On for ticks and blowfly control in sheep

Crovect™

Crovect prevents & treats blowfly strike and treats ticks, headflies & lice

CLiK™ EXTRA 65 mg/ml Pour-On Suspension for Sheep contains dicyclanil. POM-VPS
CLiK™ 50 mg/ml Pour-On Suspension for Sheep contains dicyclanil. POM-VPS
CLiKZiN™ 12.5 mg/ml Pour-On Suspension for Sheep contains dicyclanil. POM-VPS
Crovect™ 1.25% w/v Pour-On Solution for Sheep contains cypermethrin (cis:trans/80:20).POM-VPS

For further information, consult the Summary of Product Characteristics (SPC). Use medicines responsibly. Advice should be sought from the prescriber prior to use. Prescription decisions are for the person issuing the prescription alone. This promotion is only intended for farmers in England, Scotland and Wales.

CLiK™ EXTRA, CLiK™, CLiKZiN™, Crovect™, Elanco™ and the diagonal bar™ logo are trademarks of Elanco or its affiliates. 

About Elanco

Learn why we’re a leading provider of innovative solutions that protect and enhance animal health.

Connect with Elanco

Elanco Logo

PM-GB-26-0021

March 2026

© 2026 Elanco or its affiliates.