Corowa Free Press

This NFNB mutant may have existed for several years prior to its detection.

“This mutant form of NFNB is resistant to several active ingredients within three different kinds of fungicide: Group 3, Group 7 and Group 11,” Dr Dadu says.

“NFNB has the potential to reduce barley yield by up to 40 per cent, as well as impacting grain quality, so resistance to key active ingredients within the three main fungicide groups used to control the disease is very concerning for growers.”