"wparrott" wrote in message
...
Marcus Williamson wrote:
Keep GM crops out of the rest of the world. I don't want to have to
compete
with India and Africa if they can bring their yields up to world norms.
Improving the cotton yields in India alone to the world average
represents
more than the entire US cotton crop.


GM cotton does not produce any more cotton than the conventional
variety. Please stop telling untruths about "higher" yields on GM
varieties, thanks.

Technically true, if you mean their yield potential. However, yield
potential and realized yield are not the same. GM cotton is less likely
to suffer yield losses than non-GM cotton when bollworms are the
yield-limiting factor.

Even when worms are not the limiting factor it increases yields and value in
most cases. No matter what limits the yield that boll the worm eats is
cotton lost and the remnants of the larger bolls lower the grade of the
cotton making it worth less. There are always some boll worms.

BT cotton also allows you to spray for insects that you wouldn't risk
spraying for in the past for fear of destroying the beneficial and be stuck
spraying for worms all season long.

Gordon