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GM cotton halves insecticide use on earworms in Brazil

The adoption of genetically modified insect-resistant cotton to control earworms (Helicoverpa armigera) in Brazil has more than halved the use of insecticides, newswire Agrolink reports. It cites the assessment of sustainable agriculture scientific council member Ciro Antonio Rosolem, who claims that applications have fallen from 12 to five or even two with some technologies. The impact is most acute with GM cotton, he reportedly notes. “In maize and soybean areas [the use of insecticides] is far greater than with cotton. It is also certain that there are few insect-resistant soybeans and the technology tends to lose effectiveness on maize.”

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