permaculture

["Lawrence F. London, Jr." <venaurafarm@bellsouth.net>]

----- Original Message -----
From: <press-release@i-sis.org.uk>
To: <sals3@cox.net>
Sent: Wednesday, March 03, 2010 7:34 AM
Subject: Glyphosate Resistance in Weeds


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> ISIS Report 03/03/10
>
> Glyphosate Resistance in Weeds
> ########################
>
> The Transgenic Treadmill
>
> Glyphosate resistant weeds may spell the end of patented
> herbicide tolerant crops, but can farmers exit the
> transgenic treadmill that's very profitable for Monsanto?
> Prof. Joe Cummins
>
> An evolving problem
>
> Glyphosate herbicide was patented and sold by Monsanto
> corporation since 1974 under the trade name and proprietary
> formulation Roundup. The herbicide has been used widely in
> agriculture, forestry, aquaculture, alongside roads and
> highways, and in home gardening. Glyphosate is a broad-
> spectrum herbicide that poisons many plant species so it is
> frequently used to 'burn down' weeds on a field prior to the
> planting or emergence of crops.
>
> Before 1996, weeds were not observed to have evolved
> resistance to glyphosate in the field, but since then, the
> introduction of transgenic glyphosate tolerant crops has led
> to evolution of a number of resistant weeds as the result of
> the greatly increased use of the herbicide particularly
> during the post-emergent growth of the crops. Glyphosate
> reisistant Asiatic dayflower (Commelina cumminus L) common
> lambsquarters (Chenopodium album L) and wild buckwheat
> (Polygonum convolvulus L) are reported to be increasing in
> prominence in some agro ecosystems as are populations of
> horseweed (Conyza canadensis (L) Cronq) [1].
>
> In regions of the USA where transgenic glyphosate resistant
> crops dominate, there are now evolved glyphosate-resistant
> populations of the economically damaging weed species
> Ambrosia artemissifolia (rag weed), Ambrosia trifida
> L.(great ragweed), palmer pigweed (Amaranthus palmeri),
> common water hemp (Amaranthus rudis) , rough fruit amaranth
> (Amaranthus tuberculatus) and various Conyza (horse weed )
> and Lolium (rye grass) species.
>
> Likewise, in areas of transgenic glyphosate resistant crops
> in Argentina and Brazil, there are now evolved glyphosate
> resistant populations of Johnson grass (Sorghum halepense)
> and Mexican fireplant (Euphorbia heterophylla) [2]. These
> herbicide resistant weeds pose a clear threat to the
> transgenic crops dominating North and South America [3].
>
> Read the rest of this report here
> http://www.i-sis.org.uk/glyphosateResistanceTransgenicTreadmil.php
>
> Or read other articles about GM agriculture
> http://www.i-sis.org.uk/GE-agriculture.php
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