writes "Smallholder farmers in central and southern India who planted genetically modified cotton achieve larger yields, greater profits and a higher living standard than those who grow conventional cotton. The analysis showed that the yield of plots planted with Bt cotton increased by 24% compared with conventional cotton plots. This translated to a 50% increase in profits, and during 2006–08, families that adopted Bt cotton spent 18% more money than conventional farming households, suggesting an increase in living standards.
Researchers have debated how much, if any, of the yield increase can be attributed to the Bt technology. But the new study (abstract) suggests the benefits were due solely to reduced pest damage."Link to Original Source