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Australian Herbicide Resistance Initiative (AHRI)

Herbicide Resistance Surveys

Herbicide Resistance Surveys

Surveying and monitoring levels of weed infestation and herbicide resistance in Western Australian (WA) cropping regions provides data which can be used to create simulation models and guidelines for sustainable herbicide use.

Surveying and monitoring levels of weed infestation and herbicide resistance in Western Australian (WA) cropping regions provides data which can be used to create simulation models and guidelines for sustainable herbicide use.

Several surveys have been conducted in the WA wheatbelt over the last 20 years to determine the frequency and extent of herbicide resistance in our cropping regions. The first surveys were conducted in 1998 and 1999 and examined the frequency of resistance to ACCase and ALS herbicides in annual ryegrass and wild radish respectively.

In 2003, follow up surveys for annual ryegrass and wild radish were conducted to monitor changes in resistance levels over time.

In 2005, a wild oat survey was conducted to determine the extent of the wild oat problem in WA cropping, thus providing important baseline data for future monitoring.

In 2010, a fourth WA survey was conducted for ryegrass, wild radish and wild oat. It also included barley grass and brome grass weed species, thus providing baseline data for these emerging weeds, and expanded the range of herbicides tested for resistance.

Most recently in 2015, a fifth WA survey was conducted for ryegrass, wild radish, wild oat, barley grass and brome grass weed species, testing a wide range of herbicides to examine herbicide resistance evolution.

Please use the links below for further information on these and other AHRI surveys:

For detailed survey information on individual Western Australian cropping zones, please click here.

 

 

 

Follow the links below for further information: