When cotton farmers first began  using pesticides did well. They got high yields and enjoyed a real increase in income. But then problems arose. The hybrid cotton proved susceptible to pests and diseases, and it was not uncommon for farmers to spray their fields up to 30 times in a single season. Production costs went through the roof and farmers got trapped in debt. They became desperate for a technical fix, and Bt (genetically modified) cotton seemed to be the answer.

In its first year of sales, Mahyco-Monsanto sold its entire stock of Bt cotton. According to the company, the area in India under Bt cotton rose from 3.1m acres in 2005 to 14.4m acres in 2007. According to Sekhar Natarajan, regional leader of Monsanto India, Bt cotton yielded 700kg-900kg per acre, compared with 300kg-400kg an acre with conventional seeds.

However, some say that what has been happening on the ground has been very different from the official success story. Scientists Abdul Qayum and Kiran Sakhari assessed Bt cotton's performance in the first three years and found that, despite claims by the company, farmers were not achieving big yields. This perhaps was to be expected, because Bt cotton had been engineered to reduce pesticide use, not to increase yields. But, more surprisingly, they found that pesticide use was not falling either, because farmers were facing serious problems with secondary pests. They worked out that, on average, the income of non-Bt farmers was 60% higher than that of Bt farmers. Monsanto contests these numbers.

There have been other, more alarming problems. In her chat with the visiting farmers, A local woman Sattemma says she had seen several of her neighbour's goats die after spending all day grazing on post-harvest Bt cotton plants. Such a story could be dismissed as anecdotal, if it were not backed up by more solid evidence. In 2006, more than 1,800 sheep died in similar circumstances in other villages in Warangal district. The symptoms and post-mortem findings suggested that they had died from severe toxicity. Hundreds of agricultural workers had also developed allergic symptoms when exposed to Bt cotton.

Many farmers, like Sattemma, have not followed the debate around Bt cotton. She says it was practical considerations that led to the change in farming. "It was the 15 women in our village's self-help group who got things going," she says. "We were worried about the health of our children. We got the men on our side by showing them that they would save money." Sattemma points to a chart on the wall of a nearby house, on which, with the help of a non-governmental organisation, they have recorded side-by-side the expenses of growing cotton with and without pesticides. Non-pesticide management (NPM), as the system is called, is clearly more profitable, not because yields are higher but because expenditure is so much lower.

In Yenabavi, about 30 miles away, the farmers have gone further, becoming organic and declaring their village GMO-free. Their conversion also began with dissatisfaction with pesticides, this time because they didn't work. "Ten years ago, this field was covered with red-headed hairy caterpillars," says Malliah, the farmer who has led the change. "I kept applying more pesticides but I couldn't get rid of them." By chance, an organic agronomist was visiting. He showed Malliah how to set up solar-powered light traps and, to Malliah's delight, they worked. Since then, he and the other farmers have developed other natural pest controls.

Other villages are following suit. Almost 2,000 in Andhra Pradesh have adopted NPM. Raghuveera Reddy, the state's minister for agriculture wants 2.5m acres under community-managed sustainable agriculture within a few years. The long-term goal is for 10m acres, 45% of the state's cultivable land.

Sustainable agriculture involves hard work and does not guarantee huge profits, but it will not harm the farmers' health, brings personal satisfaction, and involves fewer financial risks. It is crucial to remember what is truly sustainable for small farmers.

This interesting article is adapted from the Guardian.

Linda