… But on my visit in 2002 I started to hear farmers say that it was now taking several passes with Roundup to kill the weeds and that they were using it at higher concentrations in order to kill the weeds. On visits over the next few years I started to hear about weeds which had become resistant to the Round Up which meant that farmers had to add other herbicides to the sprayer tank in order to kill those weeds. …
So it’s total fraud. Note for libertarians: you should be able to protect your rights against fraud and harm under a just legal system. But the U.S. has passed a bill protecting GMO manufacturers against court orders (see here and here).
… Why do US farmers continue to grow GM crops if they are not fit for purpose? Two reasons. Unavailability of non GM seed, as most seed breeding is controlled by the GM companies. The second is fear, because the GM traits are patented so if a farmer has not paid the “tech fee” for the right to grow GM crops and the crop is found to contain GM traits, it is deemed that the grower has stolen the technology and is using it illegally and they will be taken to court.
Studies mentioned in this article on the herbicides used on our food:
Long term toxicity of a Roundup herbicide and a Roundup-tolerantgenetically modified maize
Tumors in rats.
Glyphosate-Based Herbicides Produce Teratogenic Effects on Vertebrates by Impairing Retinoic Acid Signaling
“Teratogenic” means it causes malformations in embryos.