permaculture

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

Stacked pesticides: roundup for ordinary weeds, 2-4-D for 
herbicide(roundup)-tolerant ones, in gmo crop rotation
-------- Original Message --------
Subject: Re: [SANET-MG] 2,4-D resistant crops
Date: Sun, 14 Nov 2010 08:32:42 -0800
From: John & Maia O'Brien <johnandmaia@GMAIL.COM>
To: SANET-MG@LISTS.IFAS.UFL.EDU

"Clever" doesn't begin to describe it. It's absolutely brilliant, as in
bright light, as in conceived by the angel of the light as in positively
Luciferic!! A cut for monsatan, a cut for Dow and a cut for the oncologists.
And lest we forget despite the coopting of the "sustainable" label by
Monsatan glyphosate resistance has not resulted in less pesticide use but
MORE. But then those who have been "double-blinded" by education have any
frame of reference with concepts like "good" and "evil" ridiculed into
irrelevance. I believe it was CS Lewis who said the crowning achievement of
the devil was to convince humans that he doesn't exist.

John O'Brien


On Sat, Nov 13, 2010 at 11:40 AM, Beginning Farmers
<beginningfarmers@gmail.com> wrote:
-------- Original Message --------
Subject: Re: [SANET-MG] 2,4-D resistant crops
Date: Sat, 13 Nov 2010 14:40:17 -0500
From: Beginning Farmers <beginningfarmers@GMAIL.COM>
To: SANET-MG@LISTS.IFAS.UFL.EDU

Having read just the abstract, I am guessing that what they are interested
in here is 'stacking' 2,4-D and glyphosate resistance together in a single
crop, so that 2,4-D can be applied in a rotation with glyphosate, ostensibly
to limit the potential for (or mitigate the effects of) herbicide tolerance
in weeds.

Soon we will be back to applying all the same herbicides we were using 20
years ago, only at higher rates. And farmers will be paying substantially
more for proprietary seed owned by chemical/pharmaceutical companies.

It's a clever business plan, but that's the only positive thing I can
possibly think to say about it.


On Tue, Nov 9, 2010 at 1:53 PM, joe cummins <jcummins@uwo.ca> wrote:
Subject: [SANET-MG] 2,4-D  resistant crops
Date: Tue, 9 Nov 2010 13:53:25 -0500
To: SANET-MG@LISTS.IFAS.UFL.EDU

Dow  chemical company  has developed a transgene for crops that provides
resistance to 2,4-D and many of its relatives.  The is development is
claimed to provide ' environmental benefits of herbicide-resistant
crops'.Presumably . these GM crops will replace glyphosate (round-up)
whose value is being lost to genetic resistance.
Terry R. Wrighta, Guomin Shana,1, Terence A. Walsha, Justin M. Liraa,
Cory CuiaPing Songa, Meibao Zhuanga,Nicole L. Arnolda, Gaofeng Lina,
Kerrm Yaua, Sean M. Russella, Robert M. Cicchilloa, Mark A.
Petersona,David M. Simpsona, Ning Zhoua, Jayakumar Ponsamuela, and
Zhanyuan Zhangb
Robust crop resistance to broadleaf and grass herbicides provided by
aryloxyalkanoate dioxygenase transgenes PNAS published ahead of print
November 8, 2010, doi:10.1073/pnas.1013154107
Engineered glyphosate resistance is the most widely adopted genetically
modified trait in agriculture, gaining widespread acceptance by
providing a simple robust weed control system. However, extensive and
sustained use of glyphosate as a sole weed control mechanism has led to
field selection for glyphosate-resistant weeds and has induced
significant population shifts to weeds with inherent tolerance to
glyphosate. Additional weed control mechanisms that can complement
glyphosate-resistant crops are, therefore, urgently needed.
2,4-dichlorophenoxyacetic acid (2,4-D) is an effective low-cost,
broad-spectrum herbicide that controls many of the weeds developing
resistance to glyphosate. We investigated the substrate preferences of
bacterial aryloxyalkanoate dioxygenase enzymes (AADs) that can
effectively degrade 2,4-D and have found that some members of this class
can act on other widely used herbicides in addition to their activity on
2,4-D. AAD-1 cleaves the aryloxyphenoxypropionate family of grass-active
herbicides, and AAD-12 acts on pyridyloxyacetate auxin herbicides such
as triclopyr and fluroxypyr. Maize plants transformed with an AAD-1 gene
showed robust crop resistance to aryloxyphenoxypropionate herbicides
over four generations and were also not injured by 2,4-D applications at
any growth stage. Arabidopsis plants expressing AAD-12 were resistant to
2,4-D as well as triclopyr and fluroxypyr, and transgenic soybean plants
expressing AAD-12 maintained field resistance to 2,4-D over five
generations. These results show that single AAD transgenes can provide
simultaneous resistance to a broad repertoire of agronomically important
classes of herbicides, including 2,4-D, with utility in both monocot and
dicot crops. These transgenes can help preserve the productivity and
environmental benefits of herbicide-resistant crops. , 2,4D