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Insect-resistant Bt GMO crops have helped cut pesticide use. Now Nature is pushing back

In 2006, a small airplane started buzzing each cotton field in Arizona, a thin, dust-like cloud trailing behind it. The dust was millions of insects called pink bollworms, and the flights were part of an audacious scheme to kill them off.Pink bollworms are insidious foes of cotton. Their larvae burrow into the plant’s seed pods, called bolls, destroying the fluffy fiber within. Where bollworms infest a field, farmers may spray insecticides many times a year to limit the damage. But the air-dropped insects released in Arizona had been exposed to radiation that left them sterile, so any pink bollworms on the ground that mated with them would produce no larvae. The sterile insects were only the mopping-up part of an eradication campaign. The cotton plants themselves had struck the first, most vital blow. Genetically modified with genes obtained from an insect-killing bacterium called Bacillus thuringiensis, or Bt, the plants churned out proteins that are toxic to pink bollworms, making ....

United States , North Carolina State University , North Carolina , University Of Arizona , Iowa State University , Aaron Gassmann , Bruce Tabashnik , Dominic Reisig , Alexander Yelich , Julie Peterson , Fred Gould , University Of Nebraska , Us Department Of Agriculture , Carolina State University , Us Environmental Protection Agency , Michigan State University , Protection Agency , Iowa State , Annual Review , North Carolina State , Knowable Magazine ,

The State of Insect Resistance to Transgenic Bt Crops

A new review examines global patterns of resistance to Bt crops and outlines strategies for maximizing sustainability of this important pest management tool. ....

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Killer cotton and planes dropping moths wiped out these pests

A strategy combining genetically engineered cotton with classical pest control tactics eradicated the invasive pink bollworm from cotton-producing areas of the continental US and Mexico, a new study shows.
“Although pink bollworm remains a daunting pest in over 100 countries, our strategic coalition rid the US and Mexico of this invasive insect,” says Bruce Tabashnik, professor in the University of Arizona entomology department and lead author of the paper in the
“By analyzing computer simulations and 21 years of field data from Arizona, we discovered that genetically engineered cotton and the release of billions of sterile pink bollworm moths acted synergistically to suppress this pest,” says coauthor Jeffrey Fabrick, a research entomologist with the US Department of Agriculture’s Agricultural Research Service. ....

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