Regional crown rot management – Rowena 2017

Abstract

Key findings •• Yield loss from crown rot ranged from 14.2% in the barley variety Compass[PBR] up to 82.7% in the durum variety Jandaroi[PBR]. •• Bread wheat variety choice affected yield where there were high levels of crown rot infection, with nine bread wheats (Sunguard[PBR], Suntop[PBR], LRPB Lancer[PBR], Mitch[PBR], LRPB Reliant[PBR], LRPB Mustang[PBR], Sunmate[PBR], Coolah[PBR] and LRPB Spitfire[PBR]) being between 0.28 t/ha and 0.98 t/ha higher yielding than EGA Gregory[PBR]. •• Barley varieties had an even greater yield difference than the bread wheat varieties where there were high levels of crown rot infection, with Compass[PBR] being 2.37 t/ha and Commander 1.78 t/ha higher yielding than EGA Gregory[PBR]. •• The four durum varieties were very susceptible to crown rot with yield losses ranging from 69.7% to 82.7% and associated significant increases screenings levels. Hence, durum should only be grown in paddocks known to have low levels of crown rot inoculum.