Globally, herbicide resistance to the Group 31 herbicide mode of action has been confirmed in 3 populations of Poa annua in Australia only.
To assist in delaying the onset of resistance, rotate with herbicides from other modes of action.
Consider using alternative methods of weed control to reduce weed numbers before applying herbicides.
The above recommendations should be incorporated into an Integrated Weed Management (IWM) program. In all cases try to ensure surviving weeds from any treatment do not set and shed viable seed. Keep to integrated strategies mentioned in this brochure including cultural weed control techniques to reduce the weed seedbank. Make sure you mix and rotate herbicides from different mode of action groups. Always consult the product label prior to use.
| GROUP 31 | Inhibitors of serine threonine protein phosphatase (STPP inhibitors) |
| Unknown | endothal (Endothal®) |
URL: https://croplife.org.au/resources/programs/resistance-management/specific-guidelines-for-group-31-herbicides/
Content last updated: July 14, 2023
CropLife Australia’s Resistance Management Strategies provide a guide for crop protection product rotation through product groups. The strategies are a useful tool that supports farmers’ adoption of resistance management. All crop protection products must be handled and applied strictly as specified on the product label or APVMA permits.
These Resistance Management Strategies do not replace product labels. They are a guide only and do not endorse particular products, groups of products or cultural methods in terms of their performance. It is important to check with the Australian regulator’s (APVMA) product database for contemporary information on products and active constituents. The database can be sourced through www.apvma.gov.au
The information given in this strategy is provided in good faith and without any liability for loss or damage suffered as a result of its application and use. Advice given in this strategy is valid as at 14 July 2023. All previous versions of this strategy are now invalid.