Blowfly is the main external parasite traditionally affecting sheep in the summer months. Changing weather patterns, however, have meant that it is now not uncommon to hear of cases as early as April and as late as October.

Blowfly strike can occur quickly, and with devastating results, in warm, humid weather and despite being an annual problem, and entirely preventable, over 90% of farmers have been caught out by blowfly strike in the past1.

Lucilia sericata (Greenbottle) is the most common blow fly to parasitise sheep in Ireland. Soil temperatures above 9oC are needed for the fly larvae overwintering as pupae to mature and emerge as the ‘first wave’ of flies.

Agriland in association with Elanco are running a Blowfly outbreak monitoring campaign across Ireland. Check out the interactive map below to see if your region has been affected.

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No Blowfly
Strike Reported
Blowfly Strike
Cases Reported
High Incidences
Of Blowfly Strike

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Prevent with FleeceBind

  • Long-lasting, 16-week cover minimises labour
  • Suitable for ewes and lambs with any fleece length
  • Using CLiK directly off shears saves time by avoiding the need to re-gather sheep
  • Reduces risk of flystrike in sheep and associated productivity losses
  • CLiKZiN gives 8 weeks of protection against blowfly, with only a 7-day meat withhold
  • Suited for use on all stock including lambs for market
  • Gives farmers flexibility when marketing lambs
16 Weeks full cover and 7 day meat withold

Blowfly Strike: the facts

Blowflies are the most widespread external parasite affecting sheep in the UK and Ireland. If not properly controlled, sheep farmers can be left facing serious welfare and productivity issues, including loss of condition, reduced wool clip and leather quality, disease transmission and death.

Blowfly strike is more likely to occur in warm, humid weather (higher than 9°C). Changing climate patterns in the UK and Ireland have meant the blowfly season is starting earlier, lasting longer, and becoming increasingly difficult to predict. Agitation, dejection, odour and shedding of wool are all potential symptoms of a struck animal.

Did you know?

Why use an IGR with FleeceBind™?

Insect growth regulators (or IGRs) stop larvae from developing into the harmful second and third stage maggots responsible for fly strike. It’s important to prevent using an IGR with FleeceBind, as the consequences of blowfly strike can be costly. Figures from 2015 show blowfly strike costs the sheep industry some £2.2m per year. In addition to animal deaths, there are losses from damaged wool and fleeces, plus the cost of treatment and strike control. 2

“It’s always a good idea to treat early. A proportion of larvae in the soil will die in cold weather, but if you do an early spring treatment there will be a decrease in flies throughout the rest of the year.3

FleeceBind spreads and binds

The benefits of CLiK and CLiKZiN with Fleecebind
  • CLiK and CLiKZiN are the only IGRs with FleeceBind technology, providing full fleece protection*
  • Spreads from tip to base of fleece, around the animal and onto new wool growth
  • Binds the formulation strongly in place and sticks to the wool even if applied to damp fleece
  • Provides consistent protection, practical cover and resistance to washout
“You can keep checking for strike, but ultimately you’ll find a case and you’ll need to spend the money on treatment anyway … so why not cover the flock early?”

Correct application

Use the 4-stroke method (pictured right) to ensure an accurate spread. Apply the total required dose one quarter at a time. Best results will be achieved by holding the gun approximately 45cm from the sheep during application. Always calibrate your applicator gun and dose to the heaviest in the group.

Make the most of your medicines and your money – always use the correct applicator and follow application instructions
4 Stroke Application Method