GENTECH archive


Re: [Fwd: BT effects on soil microorganisms]]

I will send the original message again. To respond to your answer below:
The only people that I know at the entomologist meeting are from the Swiss
Inst. that punblished the effect of Bt on predators of the target organism, Dr.
I cannot judge who spent how much time and money on what. Apparently you did a
lot, which I respect. I was wondering on the points you made about producing
cotton in the right place. If it is really true that in that way it would be
impossible to produce enough cotton, the solution may be found somewhere else,
outside the agricultural production and inside the garment production. It is
absolute possible to produce garments that would last much, much longer than
their present life time  There probably are more options.
I am not necessarily scrutinizing Bt use in cotton, we are scrutinizing genetic
engineering and especially transgenics. Foodsafety for humans is one thing but
to my knowledge most of the cottonproducts are used for animalfeed. And I do
not think that these animals are not getting the highly refined oils.

Rick Roush wrote:

> Wytze:
> I did not see your original post. I will have to check the references you
> have cited, if I can obtain them. I'd also like to ask for more information
> to look into the March international meeting of entomologists, such as the
> names of a few participants who might be able to provide details on the
> conclusions cited.
> In the meantime, when I wrote  "I doubt that anyone on this server has
> spent even 1% of the time and money that I have on this problem", I meant
> the problem of insecticide use in cotton production.
> I am glad that you are scrutinizing the potential use of Bt cotton.  Again,
> I emphasise that since there is no DNA or protein in cotton seed oil once
> it has been processed for food, there are NO human health risks, only
> potential benefits from reduced exposure of farm workers to pesticides.  So
> far as I can see, the only real concern is the potential for resistance in
> the pests.
> For those who like me worry about this, may I ask for your help in doing
> something about the use of Bt sprays as the cause of widespread resistance
> in diamondback moth?
> So long as you are considering all of this, allow me to ask you to consider
> something else. Even if Bt toxins persist somewhat in the soil, the key
> question is the relative impacts of Bt transgenic crops (especially cotton)
> compared to pesticide sprays, which can also persist in the soil and are
> much less selective.  The selectivity and short persistance of Bt sprays is
> only helpful if people use Bt sprays.  The hard facts are that Bt sprays
> are too expensive to produce, and are thus amount to only 1% of the total
> insecticide market.
> I am also very busy, so further replies may take several days.
> Rick