Resultaterne begynder vi at se nu, hvor de første meldinger om Bt-resistente skadedyr begynder at dukke op. Som Bruce Tabashnik (University of Arizona) siger, så ser vi evolutionen udfolde sig for øjnene af os.
En overflod af links til at blive klog på:
- Et Gary Taubes interview med Tabashnik fra 2002 her.
Pressemeddelelse fra University of Arizona: "First Documented Case of Pest Resistance to Biotech Cotton" (7. februar 2008).
- Fra Food Democracy bloggen: You can’t fool Mother Nature: GM (Bt) crops not so pest resistant after all
Fra The Independent: "Pest evolves resistance to GM crops".
- Perspektiverende abstract fra Nature Biotechnology 26, 199-202 (2008).
Published online: 7 February 2008 | doi:10.1038/nbt1382
"Insect resistance to Bt crops: evidence versus theory" af Bruce E Tabashnik, Aaron J Gassmann, David W Crowder & Yves Carriére.
Abstract:Evolution of insect resistance threatens the continued success of transgenic crops producing Bacillus thuringiensis (Bt) toxins that kill pests. The approach used most widely to delay insect resistance to Bt crops is the refuge strategy, which requires refuges of host plants without Bt toxins near Bt crops to promote survival of susceptible pests. However, large-scale tests of the refuge strategy have been problematic. Analysis of more than a decade of global monitoring data reveals that the frequency of resistance alleles has increased substantially in some field populations of Helicoverpa zea, but not in five other major pests in Australia, China, Spain and the United States. The resistance of H. zea to Bt toxin Cry1Ac in transgenic cotton has not caused widespread crop failures, in part because other tactics augment control of this pest. The field outcomes documented with monitoring data are consistent with the theory underlying the refuge strategy, suggesting that refuges have helped to delay resistance.
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