By: Prof. Joe Cummins
Herbicide tolerant GM crops near obsolete
It has become all too clear that genetically modified (GM) herbicide-tolerant crops are not sustainable, as herbicide resistant weeds soon appear, rendering the GM crops obsolete [1, 2] ( Roundup Ready Sudden Death, Superweeds, Allergens... , SiS 28) . In addition, herbicide-tolerant crops may themselves become ‘volunteer" weeds. Monsanto Company had recognized the problem, and created patented herbicide mixtures as early as 2001 to combat weeds resistant to its formulation of glyphosate (Roundup) and volunteer ‘Roundup Ready" GM crops [3]. Herbicide-resistant weeds arise either by mutation or by gene flow from the transgenic crops [4]. The herbicide-tolerance gene from GM crops has been found to transfer to weedy relatives [5]. In short, the useful life of the original GM herbicide-tolerant crops is rapidly nearing its end.
So, crops resistant to the phenoxy herbicide Dicamba have been developed as a replacement for the near-obsolete tolerance to glyphosate, as well as glufosinate or bromoxynil. Dicamba is produced by BASF chemical corporation and marketed as Banvel, the dimethylamine salt, or as Vanquish the diglycolamine salt [6]. “Inert” ingredients in the formulations include 3,6-dichlorosalysilic acid, dimethylnitosamine, and ethylene glycol and 2,7-dichlorodibenzo-p-dioxin.
Herbicide tolerant GM crops near obsolete
It has become all too clear that genetically modified (GM) herbicide-tolerant crops are not sustainable, as herbicide resistant weeds soon appear, rendering the GM crops obsolete [1, 2] ( Roundup Ready Sudden Death, Superweeds, Allergens... , SiS 28) . In addition, herbicide-tolerant crops may themselves become ‘volunteer" weeds. Monsanto Company had recognized the problem, and created patented herbicide mixtures as early as 2001 to combat weeds resistant to its formulation of glyphosate (Roundup) and volunteer ‘Roundup Ready" GM crops [3]. Herbicide-resistant weeds arise either by mutation or by gene flow from the transgenic crops [4]. The herbicide-tolerance gene from GM crops has been found to transfer to weedy relatives [5]. In short, the useful life of the original GM herbicide-tolerant crops is rapidly nearing its end.
So, crops resistant to the phenoxy herbicide Dicamba have been developed as a replacement for the near-obsolete tolerance to glyphosate, as well as glufosinate or bromoxynil. Dicamba is produced by BASF chemical corporation and marketed as Banvel, the dimethylamine salt, or as Vanquish the diglycolamine salt [6]. “Inert” ingredients in the formulations include 3,6-dichlorosalysilic acid, dimethylnitosamine, and ethylene glycol and 2,7-dichlorodibenzo-p-dioxin.
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