Just to clarify: no one is saying GMO corn causes rootworms to develop resistance to the Bt protein engineered into the corn. Rather, the Bt protein kills all rootworms except those that already have a natural resistance to Bt, thereby allowing those few Bt-resistant rootworms to reproduce and pass the resistance genes on to ever-increasing numbers of offspring. It's a form of selection--in this case unnatural selection.--Tom -----Original Message----- From: Laurel Hopwood <[log in to unmask]> To: CONS-SPST-BIOTECH-FORUM <[log in to unmask]> Sent: Wed, Mar 19, 2014 1:56 pm Subject: Genetically manipulated Bt corn losing effect http://www.wired.com/wiredscience/2014/03/rootworm-resistance-bt-corn/ (edited) After years of predicting it would happen -and after years of having their suggestions largely ignored bycompanies, farmers and regulators - scientists have documented therapid evolution of corn rootworms that are resistant to Btcorn. 'A widespread increase in trait failure maybejust around the corner.' In a new paper, Iowa State U entomologistAaron Gassmann describes more incidents of Bt resistance. He alsofound rootworms resistant to a second variety of Bt corn. Moreover,being resistant to one variety heightened the chances of resistance toanother. Gassmann, A. J. et al. Proc. Natl Acad. Sci.USA http://www.pnas.org/cgi/doi/10.1073/pnas.1317179111(2014). laurel writes: Herbicide resistance will probably result in morepesticide use as 2-4D-ready and dicamba-ready crops may verywell be around the corner and now insect resistance is accelerating.Obviously, GMO is not the way to go! VOTE WITH YOUR DOLLAR - choose organics and/orproducts verified by the Non-GMO Project - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -To unsubscribe from the CONS-SPST-BIOTECH-FORUM list, send any message to:[log in to unmask] out our Listserv Lists support site for more information:http://www.sierraclub.org/lists/faq.aspTo view the Sierra Club List Terms & Conditions, see: http://www.sierraclub.org/lists/terms.asp - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - To unsubscribe from the IOWA-TOPICS list, send any message to: [log in to unmask] Check out our Listserv Lists support site for more information: http://www.sierraclub.org/lists/faq.asp To view the Sierra Club List Terms & Conditions, see: http://www.sierraclub.org/lists/terms.asp