Ahri Snapshots

While 2,4-D is an old herbicide, there's actually a huge knowledge gap that researchers like AHRI’s Dr Danica Goggin are trying hard to fill in a bid to find ways to overcome resistance to this herbicide group in weeds like wild radish.In her research, Danica identified a very plausible resistance mechanism in two wild radish populations. She then went on to test the translocation theory in another nine 2,4-D resistant populations of wild radish from WA.Danica characterised the resistance profile of the 11 resistant populations to find that resistance to 2,4-D and dicamba appears to be capped.Looking more closely at these 11 resistant populations also revealed that while all 2,4-D resistant populations were also resistant to dicamba, the level of resistance to the two herbicides varied.This suggests there’s no consistent cross-resistance to these two auxinic herbicides within a population.Conducting the same experiment with the radioactive 2,4-D applied to the leaves, Danica also found that translocation