February 2021

February 15, 2021

World first: glyphosate resistant capeweed

We’re blowing up our most valuable herbicides on the least productive part of the farm.

Fencelines, roadsides, drainage areas, etc.

AHRI researchers, Dr Yaseen Khalil and Dr Mike Ashworth and others have confirmed the world’s most recent addition to the growing list of glyphosate resistant weeds: capeweed.

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AHRI Insight

February 1, 2021

We’ve cracked the P450 code

About 35 years ago a ryegrass population that had been sprayed several times with Hoegrass® (Diclofop) became resistant to that herbicide and cross resistant to Glean (chlorsulfuron) before Glean® or any other ALS herbicide had ever been used in Australia.

P450 enzymes were suspected to be the cause of this cross resistance but it has taken until now to get the definitive evidence.

A very patient group of researchers led by Heping Han from AHRI, including researchers from Bayer and Zheijiang University in China have identified the P450 gene responsible for cross resistance to herbicides of at least five modes of action.

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AHRI Insight
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