Australian Herbicide Resistance Initiative (AHRI)


Working in a number of research areas, AHRI has produced a large number of publications which are available to download. View the latest publications below, or search with the filter.


Modeling the Impact of Harvest Weed Seed Control on Herbicide-Resistance Evolution

In this modeling work, Gayle Somerville evaluated the value of HWSC in minimising the rate of herbicide resistance evolution.  The modeling clearly showed the benefit of HWSC in minimising resistance evolution.  There is a real benefit in having the diversity tactic of the non-chemical HWSC in minimising the rate of resistance evolution.  HWSC reduces weed numbers over time and helps achieve greater sustainability and longevity of important herbicide resources.

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iHSD Mill Efficacy on the Seeds of Australian Cropping System Weeds

The term “harvest weed seed control” is used to describe several techniques (narrow windrows burnt, chaff carts, grain harvest chaff & straw baling, chaff-lines, chaff decks, HSD) that can be used at grain harvest in Australian grain cropping.  These techniques target destruction of weed seed harvested during the grain harvest.  The majority of the weed seed processed by the grain harvester usually exits in the chaff fraction. This work quantified the efficacy of the iHSD to destroy the seed of a range of crop weeds.

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Roberto Busi

Weed resistance to synthetic auxin herbicides

Herbicides classified as synthetic auxins have been most commonly used to control broadleaf weeds in a variety of crops and in non-cropland areas since the first synthetic auxin herbicide (SAH), 2,4-D, was introduced to the market in the mid-1940s.

The incidence of weed species resistant to SAHs is relatively low considering their long-term global application with 30 broadleaf, five grass, and one grass-like weed species confirmed resistant to date.

An understanding of the context and mechanisms of SAH resistance evolution can inform management practices to sustain the longevity and utility of this important class of herbicides.

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