Re: [escepticos] Las plagas y los transgénicos, según El País

[Nacho Jorganes]

La publicación de Science se puede descargar
aquí<http://www.scidev.net/es/news/asocian-algod-n-bt-con-proliferaci-n-de-plaga-agr-cola.html>,
al final del artículo.

Su introducción:

Long-term ecological effects of transgenic Bacillus
thuringiensis (Bt) crops on non-target pests have received
limited attention, more so in diverse smallholder-based
cropping systems of the developing world. Field trials
conducted over 10 years in northern China show that
mirid bugs (Heteroptera: Miridae) have progressively
increased population levels and acquired pest status in
cotton and multiple other crops, in association with a
regional increase in Bt cotton adoption. More specifically,
our analyses show that Bt cotton has become a source of
mirid bugs and that their population increases are related
to drops in insecticide use in this crop. Hence, alterations
of pest management regimes in Bt cotton could be
responsible for the appearance and subsequent spread of
non-target pests at an agro-landscape level.

Y el estudio concluye:

"In many parts of the world, transgenic crops such as Bt crops have come to
dominate agricultural landscapes, and their landscape-level impact has been
quantified on target pests, non-target organisms such as natural enemies or
charismatic species such as the monarch butterfly Danaus plexippus. However,
few studies have described the impact of transgenic crops on non-target
insect pests or, more specifically, assessed their landscape level effects.
To our knowledge, this study is the first confirmed report of a
landscape-level emergence of nontarget pests with the adoption of Bt crops
due to reductions in insecticide applications. Our work highlights a
critical need to predict landscape-level impacts of transgenic crops on
(potentially) pestiferous organisms in future ecological agricultural risk
assessment. Such more comprehensive risk management may be crucial to help
advance integrated pest management and ensure sustainability of transgenic
technologies."



2010/5/14 Cibernesto <cibernesto en homowebensis.com>

> A ver si me he enterao.
> Resulta que gracias a los cultivos transgénicos ya no se echan toneladas de
> insecticidas al campo.
> Entonces hay bichos que empiezan a aumentar.
> Entonces surgen nuevas plagas que amenazan a diversos cultivos.
>
> Solución que yo veo: prohibir el malvado transgénico y fumigar a lo bestia,
> como Dios manda. Dios reconocerá a los suyos.
>
>
> José María Mateos escribió:
>
>  2010/5/14 JM Mulet <jmmulet en ibmcp.upv.es>:
>>
>>> Deja, deja, si no dices que eres capaz de curar el cancer por imposicion
>>> de
>>> manos o que la verdura ecologica aumenta la potencia sexual no te hacen
>>> ni
>>> caso en la sección de ciencias.
>>>
>>
>> Escribe a la defensora del lector. Ella sí suele hacer caso.
>>
>> Saludos.
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