GM corn no longer resistant to tropical pests in Brazil

Genetically modified corn seeds are no longer protecting Brazilian farmers from voracious tropical bugs, increasing costs as producers turn to pesticides, a farm group said. Producers want four major manufacturers of so-called BT corn seeds to reimburse them for the cost of spraying up to three coats of pesticides this year, said Ricardo Tomczyk, president of Aprosoja farm lobby in Mato Grosso state.

“The caterpillars should die if they eat the corn, but since they didn’t die this year producers had to spend on average 120 reais ($54) per hectare … at a time that corn prices are terrible,” he said.

Experts in the United States have also warned about corn production prospects because of a growing bug resistance to genetically modified corn. Researchers in Iowa found significant damage from rootworms in corn fields last year. In Brazil, the main corn culprit is Spodoptera frugiperda, also known as the corn leafworm or southern grassworm. Seed companies say they warned Brazilian farmers to plant part of their corn fields with conventional seeds to prevent bugs from mutating and developing resistance to GMO seeds.

Read the full, original article: Brazil farmers say GMO corn no longer resistant to pests

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