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Australian Herbicide Resistance Initiative

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What is AHRI?


Welcome to The Australian Herbicide Resistance Initiative (AHRI) homepage! Before you dig into all our publications and podcasts, you might be wondering who we are and what we do. AHRI was a GRDC initiative which launched in 1998 under the guidance of Professor Stephen Powles. In 2018, we celebrated 20 years of GRDC funding, operating as a research group out of the University of Western Australia. You can get a great overview of what we’re all about by watching the video on the right. You can also learn more in this Outlooks on Pest Management article here.

Blog: AHRI insight
The reality of spontaneous mutation

Mon, 30 Mar 2020

Not surprisingly, de novo mutations are quite rare in the real world – but even rare things can happen if the population is large enough. When it comes to the evolution of herbicide resistance, there are two biological pathways. The first is simply natural selection where a small number of the population can withstand a particular stress (e.g. herbicide), they set seed and eventually their progeny are the majority, and they generally thrive. Resistant alleles may prolificate at the site of selection (i.e. due to frequent and regular use of a particular herbicide at that site) or they might be…

Featured Publication
Publications Cinmethylin controls multiple herbicide resistant Lolium rigidum and its wheat selectivity is P450-based

Tue, 3 Mar 2020

Cinmethylin is a new (old) herbicide being commercialised by BASF that is pre-emergent selective in wheat. Cinmethylin has been shown to be an inhibitor of acyl ACP thioesterase (Campe et al 2018). Cinmethylin is available in 2020 to growers in Australia and imminent elsewhere.

In this work, led by AHRI researcher Dr Roberto Busi, cinmethylin was pre-emergent pot-tested on a large number of Lolium populations, many of which have complex patterns of resistance to other pre and post-emergence herbicides. 


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