Africa is no stranger to scourges, but few cause as much ruin as maize streak virus. Spread by the tiny leafhopper bug, MSV plagues the southern part of the continent, where tens of millions rely on corn for more than half their daily calories. “You go into the fields and want to weep,” says Jennifer Thomson, a South African molecular biologist and expert on MSV. “You wonder why anyone bothers to plant.” Now they may have a reason. Thomson and fellow researchers at the University of Cape Town teamed up with Pannar, an African seed company, to insert mutated DNA from the virus itself plus two other genes into healthy maize, essentially short circuiting the virus’ reproductive code and immobilising the disease. In greenhouse trials, the doctored maize curbed the damage from MSV, and sometimes stopped it cold. If it passes safety tests, it could hit the market within four years. It would be Africa’s first homemade genetically modified crop.

That would be a landmark. For years, farmers in Africa and other developing countries have struggled against pests and changing weather patterns, without being able to avail themselves of all the high-tech tools that wealthier nations have. A big obstacle has been a taboo on genetic modification of food crops, inspired largely by attitudes in Europe, and a global agricultural industry that has been deaf to the problems of poor nations. But a recent series of crises is changing those attitudes. Spiking food prices triggered riots across the tropics last year. As supplies vanished, Philippine President Gloria Macapagal Arroyo went so far as to threaten rice hoarders with life imprisonment. Worldwide, grain stocks hit a quarter-century low. In a world where almost a billion people went hungry last year—119 million more than in 2007—and with food demand set to double by midcentury, the taboo against GM foods is crumbling. “There can be no doubt science must come to the rescue,” says Joachim von Braun, head of the International Food Policy Research Institute, an independent group that has always toed a cautious line on GM.

The result is a second wave of GM food crops adapted to the needs of poor nations. Emerging nations are turning to gene splicing to boost food supply and to protect harvests from the ravages of climate change, pests and pathogens. The new crops are hardier and healthier versions of staple crops. In the works are South African potatoes that repel tuber moths, Brazilian lettuce with a superdose of folic acid, a natural source of the vitamin B that aids neural development in babies, and Chinese rice that can withstand heat and drought. India is using biotech to improve bananas, cabbage, cauliflower, sweet corn, groundnuts and okra. Brazil is ginning up black beans to outsmart the mosaic virus that claims up to 90 per cent of harvests. Malaysians are fortifying papaya against the devastating ringspot disease.

It’s been more than a decade since biotech companies began to redesign agriculture by splicing genes from bacteria into crop plants or between different kinds of food. This first generation of transgenics were mostly cash crops, such as herbicide-resistant soybeans and maize. Big farmers found them easier and cheaper to manage, but they offered no benefit in taste or significant savings to consumers. In the developing world, biotech firms oversold GM products as a silver bullet for world hunger, kept a tight lid on their technology, and charged high prices. The effect was to inhibit research and frustrate poor farmers. Public opinion quickly turned against the technology, at least for food crops.

Gradually, though, a shift in attitudes, consumer habits and trade practices has been wearing away at the barriers. Significantly, developing countries are leading the way: more than 13 million farmers now plant biotech crops on 125 million hectares worldwide, triple the area planted with GM in 2000. Twenty of the 25 countries sowing GM seeds are in the emerging markets. Brazil, India and the Philippines are plowing government money into the “gene revolution”. South Africa is now the world’s eighth largest producer of biotech crops. India is the world’s fourth-largest grower of GM cotton, and China is the biggest investor in agricultural biotech after the United States. After years of balking, Beijing last year launched a $2.9 billion plan to develop a line of GM crops over the next decade.

Climate change is a big factor behind changing attitudes. Studies suggest that farm productivity falls 10 per cent with each degree Celsius of warming, which implies a drop of up to 40 per cent worldwide in the coming decades. Agriculture experts overwhelmingly agree that conventional methods are not enough. With the earth’s population set to tip 9 billion by 2050, farmable land is disappearing. Recent studies predict that developing countries could lose 135 million hectares of arable land over the next half century to erosion, declining water tables and encroaching settlement. That means farmers will have to grow more food on less land with less water. Gene splicing can achieve in a matter of weeks or months what takes decades for traditional cross breeding.

“Look at where people are malnourished today—in dry, non-irrigated land, mostly occupied by small farmers,” says Wellesley College political scientist Robert Paarlberg, author of Starved for Science on the biotech ban in Africa. “To feed these people, you need new technologies to use land and labor more productively. This is where GM will help feed the poor.”
-MAC MARGOLIS (Newsweek)