Bt cotton has doubled the seed industry and boosted the fortunes of seed firms. But yields still need to improve

In the last 10 years, Bacillus thuringiensis (Bt) cotton and its impact on farmers has perhaps been the most talked about topic in Indian agriculture since the ‘Green Revolution’ of the 1960s and 1970s. Not only has farmers’ income from growing Bt cotton risen by almost 67 per cent in the last one decade—the crop was first introduced in 2002—but Bt has made India a front-ranking,