Here’s an extremely useful study with a clear abstract. The study found that GM crop adoption in Brazil has driven up pesticide use 1.6-fold between the years 2000 and 2012.
The cumulative growth in pesticide use was three times higher than the growth in productivity (kg/ha) and 10 times higher than population growth for the same period. Each year, pesticide use per capita increased by 7%, while productivity increased by only 3.5%.
read more … – GMWatch