Is nature having the last laugh on Monsanto & Co?

Photograph of Palmer Pigweed from Syngenta blog

This U.S. report from Memphis Online last Sunday:

All across the Mid-South, hundreds of thousands of acres of cotton and soybean fields have been infested with a rapacious, fast-growing weed that's become resistant to the main herbicide on which farmers have relied for more than a decade.

Palmer pigweed, often called "careless weed" by field hands, often is surviving and even thriving despite treatments with the chemical glyphosate -- most commonly sold under the trade name Roundup.

In Arkansas alone, the weed has invaded some 750,000 acres of crops, including half the 250,000 acres of cotton. In Tennessee, nearly 500,000 acres have some degree of infestation, with the counties bordering the Mississippi River hardest hit.

The infestation is cutting farmers' cotton yields by up to one-third and in some cases doubling or tripling their weed-control costs.

The invasive noxious weed Amaranthus palmeri which is doing all that damage in America is also found in Australia and has other cousins here, including the noxious weed Amaranthus blitoides (prostrate pigweed).

Pigweed is not the only pest which has become resistant to glycines and the world-wide list includes a number of other pasture or crop weed species which are found in this country.

The biotechnology industry's boast used to be that the glycine derivative Glyphosate or RoundUp was effective in suppressing 76 out of 78 of the world's worst cropping weeds. This boast appears to be a pale shadow of its former self.

Which leads to the inevitable question - just how long will Australian farmers have before the touted 'benefits' of GM crops disappear into thin air?