Woolgrowers are being warned that above average rainfall across many of Australia’s sheep regions has raised the risk of flystrike. Australian Wool Innovation research general manager Jane Littlejohn said woolgrowers were reporting reduced protection levels of blowfly chemicals. “it’s important they determine whether they’re seeing actual resistance to chemicals or if something other than chemical resistance may be reducing the protection period or the effectiveness of the chemical treatment on their property,” she said. “Understanding chemical resistance and the role that an integrated pest management approach plays in flystrike management is crucial to woolgrowers effectively preventing and treating flystrike during the fly season.” Recent research conducted by AWI and NSW’s Department of Primary Industries has found increased resistance to some flystrike chemicals in blowfly samples, which coincides with the reports from woolgrowers of reduced protection periods. “In response, AWI has information available to help woolgrowers monitor, prevent and treat flystrike, as well as reduce the risk and manage the impact of chemical resistance on their property,” Dr Littlejohn said. She said several new and updated resources on managing chemical resistance, developed in consultation with a group of experts, were available on the AWI website. “Remember, if you think resistance is an issue on your property, this doesn’t mean the chemicals have totally lost effectiveness,” Dr Littlejohn said. “But you may be seeing shorter periods of protection than what you previously expected, so I encourage you to regularly monitor your sheep for flystrike, even if you have only recently treated them.” AWI continues to invest in breeding flystrike resistance related research and development projects with $9.9 million in funding since 2005. In August, it announced an additional $650,000 to fast-track further investigations into the development of a flystrike vaccine. AWI chariman Jock Laurie said there was evidence of increasing blowfly resistance to chemicals and the shortage of shearers were extra reasons to speed up research work. Mr Laurie said a new one-day workshop, SimpliFly, for woolgrowers looking to implement strategic flystrike control using managements tools and strategies including breeding was scheduled to be held in WA early this year. “SimpliFly pilots will inturn inform the development of the Breeding for Flystrike Resistance workshops, expected to be piloted from mid-2022,” he said. To find out more, visit wool.com/flystrikesources.