GMO Crops Mean More Herbicide, Not Less

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"But a new study released by Food & Water Watch yesterday finds the goal of reduced chemical use has not panned out as planned.  In fact, according to the USDA and EPA data used in the report, the quick adoption of genetically engineered crops by farmers has increased herbicide use over the past 9 years in the U.S.  The report follows on the heels of another such study  by Washington State University research professor Charles Benbrook just last year.
Both reports focus on “superweeds.” It turns out that spraying a pesticide repeatedly selects for weeds which also resist the chemical.  Ever more resistant weeds are then  bred, able to withstand increasing amounts – and often different forms – of herbicide."