Identification of the first glyphosate‐resistant wild radish (Raphanus raphanistrum L.) populations

Abstract

This is the first report confirming glyphosate resistance evolution in wild radish and serves to re-emphasise the importance of diverse weed control strategies. Proactive and integrated measures for resistance management need to be developed to diversify control measures away from glyphosate and advance the use of non-herbicidal techniques.

De Novo Genome Assembly of the Economically Important Weed Horseweed Using Integrated Data from Multiple Sequencing Platforms

“…This is the case with the many biotypes of glyphosate-resistant horseweed as well as several other glyphosate-resistant weedy plant species, such as johnsongrass (Sorghum halepense), ryegrass (Lolium spp. ), velvet bean (Mucuna pruriens), and wild radish (Raphanus raphanistrum; Mueller et al, 2003;Feng et al, 2004;Main et al, 2004;Zelaya et al, 2004;Koger and Reddy, 2005;Owen and Zelaya 2005;Preston and Wakelin, 2008;Ge et al, 2010Ge et al, , 2012Riar et al, 2011;Rojano-Delgado et al, 2012;Vila-Aiub et al, 2012;Ashworth et al, 2014;Sammons and Gaines, 2014). Physiologically, we know that non-target-site resistance can involve a plethora of metabolic, conversion, sequestration, and reduced translocation processes, including oxidation, conjugation, or compartmentation of the herbicide molecules (Yuan et al, 2007;Cummins et al, 2013;Iwakami et al, 2014).…”

“…At one time, the application of a combination of herbicides simultaneously or in sequence was considered to be an effective resistance management strategy. However, resistance to multiple herbicides is becoming increasingly common (Ashworth et al, 2014;Heap, 2014), and this approach is no longer consistently effective. Herbicides with new modes of action or more diversified control measures are desperately needed.…”

Broad resistance to acetohydroxyacid-synthase-inhibiting herbicides in feral radish (Raphanus sativus L.) populations from Argentina

“…In the last decade, the number of herbicide‐resistant biotypes of Raphanus spp. has increased, including those of R. raphanistrum with cross‐resistance to acetohydroxyacid synthase (AHAS)‐inhibiting herbicides from Australia, South Africa and Brazil and with multiple resistance across several modes of action from Western Australia . A biotype of feral radish with herbicide resistance to AHAS‐inhibiting herbicides was reported in Brazil, Chile and Argentina …”

Manipulating Gibberellin Control Over Growth and Fertility as a Possible Target for Managing Wild Radish Weed Populations in Cropping Systems

“…Wild radish is a significant problem for the Australian wheat industry being the most economically damaging dicotyledonous weed species in Australian cropping systems. It accounts for an estimated $53-72 million per year in crop losses (Jones et al, 2005;Llewellyn et al, 2016) with this figure in danger of increasing with the continued emergence of herbicide resistant populations (Hashem et al, 2001;Walsh et al, 2004;Walsh et al, 2007;Ashworth et al, 2014). The development of new control methods include, research into novel molecular targets (Newbigin et al, 2006;Swain et al, 2006;Young et al, 2008) that can be combined with better farming practices, as an integrated management method for combating wild radish (Cheam and Cheam, 2008;Walsh et al, 2013;Walsh et al, 2017;Walsh, 2018).…”