Spring 2016 Blackleg Update

Blackleg resistance group screening by Marcroft Grains Pathology and the University of Melbourne identified the cultivar GT42 with a new source of blackleg resistance allocated Group I. Recent screening data using lab generated blackleg isolates now indicates that cultivar GT42 has a unique combination of previously known resistance genes and will now be allocated resistance group ABDF. The cultivar GT42 has been screened in field blackleg nurseries and rated as Resistant (R) the highest possible rating. The cultivar GT53 which was previously also allocated to Group I resistance has not yet been screened against the new lab isolates. For more information please consult the Blackleg Management Guide.