A comparison of wheat and barley response to herbicides between southern New South Wales and southern Queensland

Abstract

Herbicide tolerance of wheat and barley cultivars has been tested at Wagga Wagga in southern New South Wales since the 1980s and on the Darling Downs in southern Queensland since 1999. Although each project tests the cultivars and herbicides specific for their region, a number of herbicides and cultivars were common to each project.
Overall, response between the two projects was similar for approximately 50% of the common cultivar × herbicide combinations. Crop damage was greater from testing in southern New South Wales than in southern Queensland for over a third of the common cultivar × herbicide combinations. This reinforces the need for regional testing for variations in cultivar tolerances to herbicides