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.


Gayle Somerville, pre-em

How do spatial heterogeneity and dispersal in weed population models affect predictions of herbicide resistance evolution?

Weed population simulations can be useful to predict the effects of alternative management practices on herbicide resistance (HR) evolution. Almost all previous simulations have ignored the possibility ofwithin-field spatial structure in a weed population, instead making the implicit assumption of perfectdispersal and spatial homogeneity in population density and genetics. The effects of this simplifying assumption have not been examined, despite the fact that dispersal limitations and spatial structure within the population are likely to occur and to affect the evolution of resistance. Therefore, we developed a new spatially-explicit model called SOMER. Click through for more.

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High Levels of Adoption Indicate That Harvest Weed Seed Control Is Now an Established Weed Control Practice in Australian Cropping

Not so long ago, harvest weed seed control (HWSC) was only used by a minority of early adopting grain growers. Now it has gone mainstream and pretty soon just about everyone will be doing it.

This is the result from a national Australian GRDC grower survey reported in a recent scientific publication by Michael Walsh from University of Sydney. Every few years GRDC fund a large grower practices telephone survey. The most recent survey was conducted by CSIRO in 2014, and they collaborated with Michael to design the HWSC questions.

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harvest weed seed control

Harvest Weed Seed Control Systems are Similarly Effective on Rigid Ryegrass

Our latest published paper is Harvest Weed Seed Control Systems are Similarly Effective on Rigid Ryegrass by Michael Walsh, Charlotte Aves & Stephen Powles. This field research led by Michael Walsh was in itself a major logistics task. AHRI purchased, with GRDC support, a John Deere combine grain harvester, which was transported across the nation from west to east at wheat harvest time.

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