Australian Herbicide Resistance Initiative (AHRI)



AHRI Snapshots is a podcast which provides info on what we do at AHRI

Our researchers work out of the University of Western Australia, next to the beautiful Swan River in WA’s capital, Perth.

If you’d like to listen and subscribe to our podcast via iTunes, click here. You can also subscribe via SoundCloud here

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It turns out trifluralin resistance is different

Dr Jinyi Chen

AHRI PhD student, Jinyi Chen, studied the inheritance of trifluralin resistance with target site resistance in ryegrass. She found that resistance is single gene recessively inherited. This means that both parents must have a copy of the resistance gene for the progeny to be resistant. Recessive resistance inheritance is rare in the world of herbicide resistant weeds. Nearly all other cases of target site herbicide resistance involve semi-dominance. Take a listen to learn more!


Pre-lim results on canola crop competitiveness

AHRI’s Agronomy Lead, Mike Ashworth, provides an update on the trial work the agronomy team has been doing. We find out a bit more details about some of the preliminary results from trials conducted in 2018 and we also get a snapshot of what they’re looking at this year.


What’s the deal with the emerging weed, African turnipweed?

Researchers Gulshan Mahajan, Amar Matloob, Barbara George-Jaeggli, Michael Walsh and Bhagirath ‘Sunny’ Chauhan have studied an interesting phenomenon in an emerging weed in the northern grains region – African turnipweed. In this podcast, we chat with Sunny Chauhan to learn more.


It turns out 2,4-D resistance in radish is not metabolic resistance

AHRI’s Dr Danica Goggin has found in her recent research that resistance in wild radish to 2,4-D is in fact not metabolic resistance.  Take a listen to this podcast to learn more about how she figured this out and what it means.


Pre-emergent herbicides in stubble

The latest research by Dr Yaseen Khalil from AHRI has compared the effect of rainfall on leaching of Sakura (pyroxasulfone), Arcade/Countdown (prosulfocarb) and trifluralin applied to wheat stubble. Take a listen to find out what the results were from Dr Khalil himself!


Wild radish resistant to Atrazine, very sensitive to Bromoxynil

Some new research by AHRI PhD student, Huan Lu, has shed some light on Atrazine resistant wild radish and the results have some very practical applications for growers and agronomists. The most common target site mutation that causes Atrazine resistance in wild radish is the 264 mutation, the same mutation that gave us TT Canola. They have very high resistance to Atrazine and as it turns out they are super-sensitive to Bromoxynil, requiring only about a third of the Brom rate that it takes to kill susceptible wild radish. Wild radish with the 264 mutation is also resistant to metribuzin….