The Monsanto company name, which has become synonymous with genetically modified food and as a longstanding target of environmental activists, will disappear after the completion of its $63bn (£47bn) sale to the German company Bayer on Thursday.

Bayer, a pharmaceuticals and chemicals giant, said on Monday it would immediately retire the 117-year-old Monsanto brand name. “Bayer will remain the company name. Monsanto will no longer be a company name,” it said in a statement. “The acquired products will retain their brand names and become part of the Bayer portfolio.”

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Monsanto has long been targeted by environmental activists for its pioneering role in creating GM crops and the deadly herbicide Agent Orange, used by the US in the Vietnam war. The company, which was founded in St Louis, Missouri, in 1901, has been described as an “example of American corporate evil”.

Bayer’s chairman, Werner Baumann, promised the company would engage with campaigners, who have described the takeover as a “marriage made in hell”.

Quick guide Megafarms Show Hide What is a megafarm? There is no legal definition in the UK of a mega farm, but in the US concentrated animal feeding operations (CAFOs) are defined as those housing 125,000 broiler chickens, 82,000 laying hens, 2,500 pigs or 700 dairy or 1,000 beef cattle. These are the biggest of the intensive farms, which in the UK need permits if they house more than 40,000 chickens, 2,000 pigs or 750 breeding sows. There are now 789 mega farms in the UK, and the number of intensive farms has risen by more than a quarter in six years, from 1,332 in 2011 to 1,674 last year. Why are they controversial? Mega farms and intensive farms are controversial because they require keeping tens of thousands of animals in a small space, which campaigners and independent experts say can hamper their ability to express natural behaviours, such as nesting. The animals are often kept indoors throughout their lives, though on some farms they are allowed access to outdoor areas at least part of the time. There are also concerns that animals on mega farms may be over-medicated, as if one gets sick the whole herd is generally required to be treated. Why do some people believe we need them? Mega farms and intensive farms take up much less space than traditional farms, and they allow animals to be kept securely, away from predators and potential carriers of disease, such as badgers. Their conditions are tightly controlled, allowing farmers to monitor the amount of daylight, water and feed for the animals, and if disease develops the livestock can be treated quickly. They are much cheaper to run than traditional farms.

“We aim to deepen our dialogue with society. We will listen to our critics and work together where we find common ground,” Baumann said. “Agriculture is too important to allow ideological differences to bring progress to a standstill. We have to talk to each other. We need to listen to each other. It’s the only way to build bridges.”



Adrian Bebb, a food and farming campaigner at Friends of the Earth Europe, said Bayer’s decision to ditch the Monsanto name would not alter the company’s legacy.

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“Bayer will become Monsanto in all but name unless it takes drastic measures to distance itself from the US chemical giant’s controversial past,” he said. “If it continues to peddle dangerous pesticides and unwanted GMOs then it will quickly find itself dealing with the same global resistance that Monsanto did.”

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Friends of the Earth has run a long campaign to try to prevent the takeover, which it warned would “increase control over farmers and cut out competitors, and allow it to become the dominant ‘Facebook of farming’.”

In May, dozens of people demonstrated against the takeover outside Bayer’s AGM in Bonn.

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“This merger will create the world’s biggest and most powerful agribusiness corporation, which will try to force its genetically modified seeds and toxic pesticides into our food and countryside,” Bebb said. “The coming together of these two is a marriage made in hell – bad for farmers, bad for consumers and bad for our countryside.”

Bayer won approval for the takeover from US and European regulators after agreeing to sell $9bn worth of assets to reduce the combined companies’ dominance of the global seeds market.

“The acquisition of Monsanto is a strategic milestone in strengthening our portfolio of leading businesses in health and nutrition,” Baumann said. “We will double the size of our agriculture business and create a leading innovation engine in agriculture, positioning us to better serve our customers and unlock the long-term growth potential in the sector.”