Diflufenican resistance in wild radish (Raphanus mphanistmm L.): its discovery and consequences for the lupin industry

摘要

We reported the first population of wild radish resistant to diflufenican, a Group F herbicide which targets the enzyme phytoene desaturase, in 1999. This was the first documented case of diflufenican resistance in any plant in the world. Since then,sixteen Western Australian wild radish populations have been confirmed resistant to diflufenican. It is highly likely that there are more wild radish populations, already resistant or developing resistance to diflufenican, that have not been detected. Todate, diflufenican is the herbicide of choice for wild radish control in lupins and farmers whose paddocks are infested with diflufenican-resistant wild radish are already finding it difficult to manage the resistant population. This is further exacerbated in cases where multiple resistance to both diflufenican and triazines occurred. If this multiple resistance becomes widespread, it will have serious consequences for the lupin industry. This paper reports the discovery of diflufenican resistance in Western Australia and discusses why diflufenican resistance is a threat to the lupin industry followed by suggestions on how growers can confront this threat.