Herbicide technology is superb for weed control in global field crops. By easily and cheaply controlling crop weeds, herbicides make major contributions to global food production.  In one sense, herbicides have been too successful in that their dominance and over-reliance without diversity for crop weed control in many agro-ecosystems has enabled the evolution and rise of herbicide resistant weed populations.  This is particularly so in some developed nations but is increasing in developing nations. In the absence of discovery of new herbicides the widespread evolution of resistant weeds is a looming threat, especially so because major weed species are demonstrating multiple resistance across many herbicides.  This presentation will provide an overview of the resistance challenge and the major mechanisms by which plants resist herbicides, especially the accumulation of mechanisms and metabolism-based herbicide resistance in major crop weed species.   Ways in which herbicide resistance can be minimized and managed will be discussed.

Mechanisms through to management of herbicide resistant weeds

248th National Meeting (2014)

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