Bt cotton: the debate resurfaces
Cotton prices are in turmoil. While climatic factors threaten stocks, discussions on future crops are launched. Between two discussions, one word keeps coming: Bollgard. This is the full name of Bt cotton, the genetically modified cotton, marketed by Monsanto since 1996. This includes bacteria that produce toxins against the deadly caterpillar moths and weevils capsules.
Bt specifically eliminates these insects that attack plant capsules. It thus reduces the losses on a plantation. Coupled with lower production costs due to lower pesticide use, the argument has already won nine countries: the United States, Argentina, South Africa, Australia, Mexico, Colombia, India, Brazil and China.The cultivation of Bt cotton in 2009 and accounted for nearly half of the 33 million hectares dedicated to this crop in the world.
In the U.S., for 88% of the cotton area is devoted to him. The Chinese world's top producer, he provided 70% of its acreage. In India, cotton occupies 90% of the area as in Pakistan. In Africa as the "Bt" is gaining ground. In Burkina Faso, one quarter of the 115,000 hectares sown allocated to it and the country intends to expand production to 475,000 hectares with an expected gain of 100 million dollars this year.
Perverse
During the first years of its use, Bt cotton generated much enthusiasm on the part of observers. INRA in 2001 suggested an increase in yield of up to 80% for a 70% reduction of pesticide application.United States, a study by the National Cotton, dating back to 2000, reported an economic benefit of $ 50 per acre for the cultivation of Bt cotton
Ten years later publications show more distrust. "The effectiveness of Bt cotton is no longer sufficient," says Michel Fok, a CIRAD researcher, in a study published last July. Bt has had the perverse effect of open fields to new generations of insects more resistant. Caterpillars, spiders, bugs are multiplying and the sophistication of GM seeds to deal with these threats no fax payday loan dramatically raised prices.
The seeds have become four times more expensive than conventional seeds, $ 85 per acre in 2009 against $ 20 in 2005. The market was flooded by Monsanto, does not offer many choices for farmers. 'Bt is a short term solution.Its use becomes a vicious circle of indebtedness for the farmer, "says Jeremy Tager, GM campaigner for Greenpeace.
The issue is environmental. The products used to treat these threats are accused of depleting the soil. "The change was not clearly anticipated but it now operates in China and the United States to such an extent that the need to chemically control may threaten the continued production," concluded researchers at a conference on GMOs in Australia in 2009.
New GM at the horizon
Last March, for the first time in its history, Monsanto recognized a failure to meet these larvae. Having offered to farmers to use Bollguard 2, the firm will soon market the third generation, Bollguard 3. Other companies are following suit in the image of Bayer TwinLink with cotton or Syngenta."These new GM does not guarantee higher returns. They accelerate the vicious cycle. This system supports a model of intensive agriculture instead of a subsidized farming. The situation is extremely worrying, "says Greenpeace advocates finding a" balance "in research on crop improvement.
"With all of this, the appropriateness of a return to the cultivation of conventional cotton, to a degree not explained, is mentioned. There is already a reality in 2009, there have been 400,000 acres (a total area of 8.9 million cotton acres) and an area of 1.5 million acres is predicted 2010, "concludes Michel Fok for his part, CIRAD.
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