Evidence GMOs do not increase yields or reduce herbicide use

"Since genetically modified crops were introduced in the United States two decades ago for crops like corn, cotton and soybeans, the use of toxins that kill insects and fungi has fallen by a third, but the spraying of herbicides, which are used in much higher volumes, has risen by 21 percent. By contrast, in France, use of insecticides and fungicides has fallen by a far greater percentage — 65 percent — and herbicide use has decreased as well, by 36 percent." "Another big difference: the price tag. Mr. Rousseau’s seeds (nongenetially modified corn seeds) cost about $85 for a 50,000-seed bag. Mr. Stone spends roughly $153 for the same amount of biotech seeds." " Driven by these sales, the combined market capitalizations of Monsanto, the largest seed company, and Syngenta, the Swiss pesticide giant, have grown more than sixfold in the last decade and a half. The two companies are separately involved in merger agreements that would lift their new combined values to more than $100 billion each." "Figures from the United States Department of Agriculture show herbicide use skyrocketing in soybeans, a leading G.M. crop, growing by two and a half times in the last two decades, at a time when planted acreage of the crop grew by less than a third. Use in corn was trending downward even before the introduction of G.M. crops, but then nearly doubled from 2002 to 2010, before leveling off. Weed resistance problems in such crops have pushed overall usage up." "For rapeseed, a variant of which is used to produce canola oil, The Times compared Western Europe with Canada, the largest producer, over three decades, including a period well before the introduction of genetically modified crops. Despite rejecting genetically modified crops, Western Europe maintained a lead over Canada in yields. While that is partly because different varieties are grown in the two regions, the trend lines in the relative yields have not shifted in Canada’s favor since the introduction of G.M. crops, the data shows." "In the United States, while the use of insect-and-fungus-killing chemicals has declined, farmers are using even more weed killers."

Source:Hakim, Danny. "Doubts About a Promised Bounty of Genetically Modified Crops." The New York Times, October 30, 2016. Accessed at http://www.nytimes.com/2016/10/30/business/gmo-promise-falls-short.html

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