[misto]

Of course not the only reason, but a reason nonetheless.

"Contrary to often-repeated claims that today’s genetically-engineered crops have, and are reducing pesticide use, the spread of glyphosate-resistant weeds in herbicide-resistant weed management systems has brought about substantial increases in the number and volume of herbicides applied. If new genetically engineered forms of corn and soybeans tolerant of 2,4-D are approved, the volume of 2,4-D sprayed could drive herbicide usage upward by another approximate 50%. The magnitude of increases in herbicide use on herbicide-resistant hectares has dwarfed the reduction in insecticide use on Bt crops over the past 16 years, and will continue to do so for the foreseeable future."[1]

Please bare in mind that I'm not advocating against GMO. I'm advocating against hailing GMO as a win:win to all of society and environment.

[1] https://enveurope.springeropen.com/articles/10.1186/2190-471... "Impacts of genetically engineered crops on pesticide use in the U.S. -- the first sixteen years"