Ecofarm
Deity
if the gene is safe.
First, good write-up and welcome to the sustainable farming team.
Now, I'll discuss the "safety" a little.
1. Glyphosate resistance (one of the top three splices, those being bt legume and glyphosate resistence).
a. Allows for post-emergence (of crop) spraying. Theoretically, this allows farmers to spray less before the crops come up since they can spray after, using less total herbicide. In reality, the farmer can hose his field as much as he like and often errs on the weed-eradication side of the equation.
b. Affect on non-target plants. Glyphosate (round-up) is a broad range herbicide, killing indescriminatly all vegetation (except the GM) for thousands of acres... creating a bio-desert.
c. Herbicide resistence is increasing drastically as a result of exposing weeds to glyphosate on a year-round basis. We already have "super-weeds" that show a naturally derrived resistence to glyphosate similar to the GM crops.
d. Gene-movement is possible. Through many means, it is possible for the GM genes to find their way into other species... from horizontal gut transfer to pollination between varities.
2. Bt producing crops
a. Insects develop resistence, but the chemical companies assure us that they have even better stuff 'in the pipe'.
b. Millions of acres of plants producing Bt dimishes the usefullness of it as a natural pesticide. As a main pesticide for organic farmers, diminishing its effectiveness seems almost like sabotage.
c. Bt is broad range. It kills indescriminantly, see: Monarch Butterfly.
3. Legume splice.
a. Not much of a problem with this one, but it doesn't work much.
One should note that all of the GM "improvements" have been geared to helping the farmers on their chemical treadmill. None of the GM varieties are for improved nutrition, reduced water use or better taste. There is no consideration for the consumer in first generation GMCs.
Aside from the specific variety problems, we should look at the "chemical treadmill" and its impact on a farm's economic, social and ecologic systems.
Lastly, consider the loss of biodiversity. While in a conventional monoculture, at least there is variety between individuals, in a GM monoculture each individual is genetically identical. Combined with glyphosate, there could be only one surviving strand of plant DNA for thousands of square miles that appear lush and healthy.