Herbicide resistance is a major problem in Australian grain cropping, reducing the herbicide choices available to growers and increasing their costs. There is a need to increase the availability and flexibility of controls for herbicide-resistant weeds, including new herbicide uses.

This project will develop data sets for registration of new uses for existing herbicides. It will broaden the choice of herbicide uses available to growers through identifying new uses for existing registered pre- and post-emergent herbicides and getting those new uses on labels or permits. The main output of the project will be the development of new herbicide treatments for the site-specific management of feathertop Rhodes grass, awnless barnyard grass, fleabane, sowthistle, brome grass, barley grass, and wild radish present in crop and fallow situations.

The focus in the southern region will be to find alternative options for controlling winter grass weeds. The northern region will have the objective to find alternative products or combinations of products for optical spray technology application or developing new treatments for more recently discovered glyphosate-resistant species. In the western region, work will finalise new treatments to combat wild radish.

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This work is a collaborative project between The University Queensland, NSW DPI, The University of Adelaide, and The University of Western Australia.