Managing herbicide resistance in Southern Australian farming systems using Roundup Ready canola

摘要

In the 2009 season almost 73% of paddocks in which Roundup Ready canola was grown were reported to have resistance to at least one herbicide mode of action (MO A) with 42%) being resistant to at least two MOA. Experimental results showed 95%) controlof Group B resistant annual ryegrass (Lolium rigidum) populations using Roundup Ready herbicide in canola cropping situations. A potential threat with the introduction of Roundup Ready canola is for increased glyphosate resistance. Practices that are not based on glyphosate are required in the year following Roundup Ready canola with the number of these depending on the risk profile of the paddock in which the Roundup Ready canola is grown. This is being implemented as part of the Roundup Ready canolaresistance management plan, which mandates that growers implement IWM. This plan provides growers with flexibility in their management options, whilst preserving the effectiveness of glyphosate and other herbicides in the farming system.