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Genetically Engineered Corn

Cons of Bt Corn
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Cons of Bt Corn
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Along with the benefits the introduction of transgenic crops has raised a number of possible negative consequences.  One prime example is about the Starlink Corn, which can be found on another page on this site.  The following are other cons against Bt Corn and transgenic crops.

  The low tillage is also a prime spot for a monoculture in the fields.  A monoculture is where all of the crops are the same, so with this it is a perfect situation for weeds.

  Genetic pollution from the Bt corn is also another concern.  It is thought that the genes can spread into other organisms through pollen, seeds and microbial process.  This is different then other types of pollution because once the genes are out they cannot be re-called. An example is canola seeds in Canada, when some canola seeds were contaminated with unapproved genetically modified rapeseed and accidentally shipped to the UK.  The UK had already planted these seeds and the crops had to be destroyed. 

  The total herbicides used with the herbicide resistant crops will kill all weeds and reduce the biodiversity.  This in turn will effect the crops because if one species is taken out completely, you cannot successfully predict what will happen to the other species.

  The Bt corn can also kill other beneficial insects such as the monarch butterfly, bees, and ladybugs. 

  Also putting the Bt toxin in the corn will subject the insects to the toxin longer and thus can in turn allow a natural genetic resistance to the toxin.

  The Bt corn can produce unpredictable toxins and allergens into food plants and therefore into the final product.  Also the Bt corn can be considered unstable as the number of copies of an inserted gene changes through later generations of the Bt corn.

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