;
Australian Herbicide Resistance Initiative
Sign up for our newsletter & get access to short & sharp insights into the world of more crop, less weeds

We respect your
email privacy

AHRI Agronomy Trials


Introducing our new GRDC funded crop competition projects. Dr Mike Ashworth and Roberto Lujan Rocha are working to minimise ryegrass and wild radish weed seed production, whilst maximising yields.

Blog: AHRI insight
Metabolic trifluralin resistance

Mon, 8 Oct 2018

Just when we thought we understood the mechanism of trifluralin resistance we blink and find another. Earlier in the year, we reported on research by AHRI PhD student Jinyi Chen confirming that a target site mutation that infers resistance to trifluralin. Earlier in the year, we reported on research by AHRI PhD student Jinyi Chen confirming that a target site mutation that infers resistance to trifluralin. Now Jinyi has confirmed that metabolic resistance to trifluralin is also possible.

Featured Publication
Publications Influence of Crop Competition and Harvest Weed Seed Control on Rigid Ryegrass (Lolium rigidum) Seed Retention Height in Wheat Crop Canopies

Tue, 9 Oct 2018

In this paper, Walsh et al at several sites confirmed that the majority of retained Lolium seed at grain harvest will be captured. This was true in crop fields in which HWSC had been conducted for several years. 

Please note that we are NOT stating that plants cannot evolve resistance to HWSC. Indeed, everything that herbicide resistance has taught us is that plant populations will respond to any persistent, effective selection pressure. Importantly, this study showed that a good, competitive wheat crop meant that Lolium responded with taller plants, meaning that retained weed seed was relatively high in the canopy and thus captured by HWSC.  This shows the yield and weed control advantages of having a good, competitive high yielding crop. A healthy, competitive crop, HWSC and diversity in methods of weed control are key to sustainable systems!


Grains Research and Development CorporationWeed smartDiversity Era logo