Novartis Seeds were the first biotechnology company to sell Bt-corn and their products are now grown commercially in the US, Canada, Argentina and Spain.
Indeed, researchers at Iowa State University and the US Department of Agriculture found that in Bt-corn the level of fumonisin is reduced by as much as 80% compared to conventional corn.
Cornell's laboratory research suggests that wind-blown pollen from the Bt corn could disrupt the monarch caterpillar's feeding -- often killing them before they metamorphose from caterpillars to butterflies.
Insect-resistant corn containing the BT toxin, derived from a bacterium and used in organic farming, does kill butterflies and other good insects but far less than 1% of them.