QHow do you prevent pesticide from being consumed by grazing cattle, goats, etc ??Monsanto and friends just shift the toxins from the contaminated soil directly into the chain of the ecosystem. So insects or cattle that feed off of the toxic rich plant wil

How do you prevent pesticide from being consumed by grazing cattle, goats, etc ?? Monsanto and friends just shift the toxins from the contaminated soil directly into the chain of the ecosystem. So insects or cattle that feed off of the toxic rich plant will also get contaminated and the heavy metals will migrate within months not years, all the way up the food chain until they reach the top predator which unfortunately happens to be us humans.

AExpert Answer

Biotechnology has nothing to do with heavy metals, so I’m going to focus on the question it appears you’re asking about Cry proteins (i.e., Bt proteins), which have been expressed in genetically modified (GM) crops to protect them from insect damage. You offer an interesting perspective, but remember that the soil is just soil (as it has always been) and it contains bacteria (just as it always has) and some of that bacteria is Bt, or Bacillus thuringiensis (just as it always was). These bacteria are ubiquitously distributed in the environment, and therefore, their Cry proteins also are ubiquitous. Thorough testing has shown that modifying a crop plant to express Bt proteins is safe.  And in fact, these insect-resistant crops mean decreased use of chemicals that are used to protect against insect damage.

 

With regard to a Bt protein moving “up the food chain”―it will not happen.  The human digestive system treats Bt proteins the same way it treats dietary proteins.  In other words, it easily breaks them down into individual amino acids and small peptides that are absorbed for nutritive purposes.  Bt proteins have long been used in agriculture without any effects on mammals, birds or other non- target (non-pest) species.  They have a very narrow spectrum of activity because they have to bind to specific receptors on the lining of the gut of insects, and those receptors are not present in these other organisms. 

Posted on February 2, 2018
A former response to a similar question answered by Dave Kovalic, Regulatory New Technology Lead at Monsanto, also provides information on scientific advancements and how they [Monsanto] affirm safety prior to targeted vector insertion.   “For context, it is important to recognize that random genome insertions have been naturally occurring in crops over the ~10,000-year history of agriculture.  In some crops, more than 90 percent of the genome consists of these... Read More
Posted on February 2, 2018
In terms of the science behind the technology to create GMOs, scientists have a much better understanding how a transgene is delivered and stably integrated into a chromosome (or genome). Many GMO products, such as Bt corn, were made using Agrobacterium cells to deliver useful trait genes into the plant cells. Scientists were able to dissect the different steps of this natural gene delivery system encoded by Agrobacterium. We now have a good understanding of the interactions between... Read More
Posted on February 2, 2018
A former response to a similar question answered by Dave Kovalic, Regulatory New Technology Lead at Monsanto, also provides information on scientific advancements and how they [Monsanto] affirm safety prior to targeted vector insertion.    “For context, it is important to recognize that random genome insertions have been naturally occurring in crops over the ~10,000-year history of agriculture.  In some crops, more than 90 percent of the genome consists of these types... Read More

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