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.
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
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.
It is important to always use the correct application for the parasite you are looking to control. For example, use the T-Bar nozzle to treat blowfly strike. Always calibrate your applicator gun and dose to the heaviest in the group.