Soybean damage caused by Bayer’s drift-prone dicamba herbicide spurs farmers to use competing GMO seeds, weedkillers

A sign marks a field of XTEND Soybean, a Monsanto brand of genetically modified soybean

Bayer AG’s takeover of Monsanto has been beset by problems, and now a decades-long dominance of the $4 billion U.S. soybean seed market is under threat from rival Corteva Inc.

Bayer told Reuters it expects plantings of its genetically modified Xtend soybean seeds to flatline this year for the first time, after three years of strong growth since their launch with an accompanying weed-killer. It projects plantings in 2020 will stay at about 50 million acres, which was 66% of the American crop last year.

Meanwhile Corteva, formed last year from the agricultural units of Dow Chemical and DuPont, expects its Enlist E3 seed to make up 20% of the U.S. crop in 2020, the first year it has been widely available.

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screenshot bayer s top seed faces u s soybean challenge from corteva
Credit: Reuters

The shift in the industry landscape is being driven by farmers like Ron Heck, in Perry, Iowa, who is ditching Bayer’s product and plans to go all-in on Corteva’s new soybean this spring, planting it across 2,000 acres.


Seeds are genetically modified to resist certain types of weed-killers and farmers must use only those herbicides to avoid damaging their soybeans. The problem for Bayer is that a herbicide used for Xtend soybeans, dicamba, is known to drift away and damage crops that are unprotected.

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