It is presumed that remarkable increases in cotton productivity in India have come about through bacillus thuringiensis cotton and that this approach therefore must be replicated in other crops.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/bt-cotton-and-myth-enhanced-yields
[2] http://admin.indiaenvironmentportal.org.in/category/author/kavitha-kuruganti
[3] http://admin.indiaenvironmentportal.org.in/category/journal/economic-and-political-weekly
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/seeds
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pest-control
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soyabean
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cotton
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gm-crops
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/genetic-engineering
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/myths
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/china
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/andhra-pradesh
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gujarat
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/madhya-pradesh
[18] http://admin.indiaenvironmentportal.org.in/category/thesaurus/statistics