Genetically modified (GM) Bt cotton:
perspectives on a controversy
Geeta Bharathan (State University of New York at Stony Brook, NY, USA)
Shanti Chandrasekharan (Indian Agricultural Research Institute, New Delhi, India)


Poster presented at
             TERI organized "Stakeholders' Dialogue on Agricultural Biotechnology: Biosafety and Economic Implications," Gurgaon, Haryana, India, August 14, 2000
&
GRC sponsored "New Frontiers in Science & Technology policy,"
Plymouth, NH, USA, August 20-24, 2000


Some Issues

Indian farmersí protests against the Monsanto-Mahyco field trials of genetically modified (GM) Bt-cotton during 1998-99 highlighted global controversies surrounding genetic engineering technology in agriculture. These protests drew the support of anti-GM forces across the world, raising questions such as: what do the protesting impoverished, small cotton farmers in southern India have in common with, e.g., the protesters who impeded WTO negotiations in Seattle? Where, if at all, do their interests coincide?

 Is the problem largely technological (according to protesters in USA and Europe), or
is it largely societal (according to protesters in India and other parts of Asia)?

Molecular biological, organismal, and ecological issues surrounding the Bt-cotton project are examined in order to identify the level of organization at which known and potential problems arise and, thereby, to identify the level/s at which such problems are best addressed.


Some observations
Protests in the two nations apparently were shaped by differing dominant concerns: socio-economic in India, ecological in the USA.  However, in both cases, these dominant concerns obscure other important aspects of the issue, and are partly a consequence of distorted perceptions of the underlying technological issues.

In India, protesters were largely led by small farmers reacting to actual (non-GM) and potential (GM-related: 'terminator' technology, wrongly equated with all GM) agricultural problems related to cotton; another issue was the non transparent regulatory process. The biological questions raised in here and elsewhere4 were not at issue in the protests, even though answers to these questions are critical for a better understanding of the regulatory process.

In the USA, protesters were largely led by organic farmers and environmentalists reacting to potential ecological threats posed by all GM crops. A technological means of safeguarding intellectual property rights (IPR's), terminator technology, was seen as a 'moral' problem; however, a social means of doing the same, via legal measures, was neither widely discussed, nor viewed as a problem. The regulatory process (while it could be improved7) is relatively transparent and addresses several potential biological problems.


Some conclusions
Issues surrounding GM technology in the two nations are both technological and societal in nature.  However, in public discourse in the US technological issues prevail, while in lndia societal issues do so.  This apparent difference between the two nations hides important similarities:
  • in both nations protests arise from dominant societal concerns that represent the sum of technological and societal forces, some of which are identical. It is misleading to characterize the issues in terms of EITHER technological OR societal.
  • in both nations a distorted understanding of technology played an important role in shaping public perceptions. Scientists have an obvious role in clearly presenting the technological issues while separating them from the societal ones, as well as in keeping the regulatory process transparent.
  • in the prevailing equations in the two nations it is around a societal issue, IPR's, that disparate interests converge.  The 'terminator' technology was patented to fulfill a perceived societal need: a commercial interest to protect IPR's. Monsanto, representing this commercial interest, is merely a convenient target.

  •  

    Bt (Bacillus thuringiensis toxin) technology: general technological features and issues
    Molecular biological, organismal and ecological (including agricultural)

    Bt toxins comprise a large family of proteins produced by the bacterium, Bacillus thuringiensis. The protein, in crystalline form, is deposited on the bacterial cell wall and is toxic to lepidopteran insects (moths, butterflies) on ingestion and digestion. CryIAc is one of these proteins, produced by the cryIAc gene. Bollgard gene is a modified version of the cryIAc gene derived from the strain Btk HD-73. Bt toxins have been used against crop pests (e.g., by organic farmers in the US as bacterial sprays); however, affected insects may be pestilential, benign, or beneficial1.


    Resistance to Bt (CryIAc) toxin is likely to evolve under continuous selection pressure in variable populations, in absence of non-Bt plant refuges for susceptible insects and high toxin levels to kill semi-resistant heterozygotes

    Loss of an environmentally benign pesticide, Bt, is likely to occur due to evolution of resistance. What are the costs and benefits of this potential loss?

    Bt technology: specific technological issues (India, USA)
    Molecular biological, organismal and ecological (including agricultural)
    Inter- and intraspecific variation
    Relative susceptibilities of cotton 
    pests to Bt (CryIA)
    Lepidopterans variably susceptible3,5,6,9
    Helicoverpa<Heliothis
    Pectinophora<Helicoverpa
    Spodoptera<Helicoverpa
    Non-lepidopterans not susceptible1
    Bemisia, Anthonomus
    Variation in susceptibility
    High intraspecific variation8,11,10a
    Helicoverpa, Spodoptera, Pectinophora
    Low intraspecific variation
    Heliothis
    Bt cotton projects in India and USA
    India
    United States of America
    Major pests13
    Helicoverpa armigera (American boll worm)
    Pectinophora gossypiella (pink boll worm)
    Spodoptera litura (army worm)
    Bemisia tabaci (white fly)
    Major pests
    Heliothis virescens (tobacco bud worm)
    Helicoverpa zea (cotton boll worm)
    Pectinophora gossypiella (pink boll worm)
    Anthonomus grandis (boll weevil)
    Bt protein levels
    No information
    Bt protein levels
    High at start of season, low toward end of season 
    Field Trials
    Scale small
    Area: 1 acre
    Time: 2 seasons
    Field Trials
    Scale large
    Area: 100 acre
    Time: > 6 seasons
    Resistance Management
    No information
    Resistance Management
    Refuge for susceptible individuals; continuous high protein levels to kill semi resistant heterozygotes
    Effects on non pests
    No information
    Effects on non pests
    Monarch butterfly larvae susceptible; 
    Poorly understood 
    Transfer of pollen to wild relatives
    No information 
    Transfer of pollen to wild relatives
    Some risk in S. Florida
    Preliminary biological assessment of technology
    India
     United States of America
    Details of results of field trials not public;
    *CryIAc not the best gene for Indian conditions?4
    Overall reduced pesticide use, technology beneficial despite potential for resistance evolving in some pests 7
    Known: Major pests, H. armigera and Spodoptera, are less susceptible to Bt toxin than is Heliothis, major US pest against which Bollgard gene was developed.  Susceptibility is highly variable8 and resistance evolves rapidly in the laboratory10Bemisia  is unresponsive

    Unknown, uncertain, or information not easily accessible: Response of army worm in India, crop resistance in field; crop Bt levels throughout season; effect of Bt crop on nonBt species; chances and likely consequences of Bt pollen transfer to wild relatives.

    Bt cotton extensively grown in Arizona: decrease in non-Bt refuges increases chances of evolution of resistance in Pectinophora (the major pest in Arizona)7.

    Low toxin levels late in the season: relatively low susceptibility combined with high intraspecific variation increase chances of evolution of resistance in Helicoverpa7.

    Cultivation in S. Florida disallowed by Environmental Protection Agency (EPA)


     
    *Bt cotton has been approved for commercial cultivation by Government of India regulatory body
    Bt technology and anti-GM, anti-Monsanto* protests
    Technological and societal issues surrounding protests
    India

    Bt cotton regulation
    1990   Monsanto refused permission to test Bt cotton in India
    1996 Mahyco**given permission to import and test Bt cotton seeds
    1996-98  Bollgard cotton back crossed into Indian varieties
    1998 June: Bt cotton field trials started
                Nov.:  Bt cotton field trials publicized

    'Terminator' technology
    1994   Patented by Delta & Pine Land Co (DPL) and United States Department of Agriculture (USDA)19
    1998   Monsanto^ acquiring DPL
    1998   March: international publicity (RAFI)14
              June: Indian publicity. 

    GM = 'Terminator' = Bt cotton in concerned public eye

    Modernized cotton farming in India
    1980's Extension into non-traditional areas17
    1997,1998 Nov-Dec Crop failure, indebtedness, farmer suicides15,16,17,18

    The conflagration
    1998 Nov.  Mahyco-Monsanto Bt cotton field trials burnt by agitated farmers.  Field trials banned in Karnataka state^^
     

    USA

    Bollgard gene technology
    1992, 1996 Monsanto patents Bollgard gene (US patent 5,500,365)
    1995  Monsanto receives approval from USDA and EPA for commercialization

    'Terminator' technology
    1994   Patented by DPL and USDA19
    1998   Monsanto^ acquiring DPL
    1998   March: international publicity (RAFI)14
    1999   Mention in mainstream press

    Ecological studies on GM crops
    1998  Transfer of pollen from GM to wild relatives in Brassica (rape seed)
    1999   Deleterious effect of Bt corn pollen on Monarch butterfly: wide publicity

    GM = ecological disaster in concerned public eye












    Protests 
    1999 onward  Protests against GM and globalization, in general, and Monsanto, in particular

    *Transnational corporation based in St. Louis, USA
    **Indian seed company based in Maharashtra state, India. Mahyco is the world's largest producer of hybrid cotton seed20
    ^Deal fallen through since
    ^^Ban rescinded since
     
    Public perception: India

    Why protests?

    • failed cotton crops (including some Bt trial fields) due to heavy pest infestation, leading to suicides
    • sensitivity to socio-political implications of 'terminator' technology
    • non transparent regulatory process whose decisions were revealed by activists and the press during a period of heightened emotions
    Why Monsanto?
    • force behind Bt gene technology (cotton)
    • perceived owner of 'terminator' technology
    • representative of transnational corporation, viewed as exploitative
    Public perception: USA

    Why protests?

    • ecological and societal risks of Bt gene
      • danger to non target species (e.g., Monarch butterfly)
      • loss of Bt pesticide to organic farmer
    • ecological risks of engineered gene transmission to wild relatives of crop plants
    • socio-political (=moral?) implications of 'terminator' gene for developing nations
    Why Monsanto?
    • force behind Bt gene technology (cotton and corn)
    • perceived owner of 'terminator' technology
    • representative of transnational corporation, viewed as exploitative

    References

    1. deWald, S. 1995. Bt Insecticidal crystal proteins and their mode of action. Information Systems for Biotechnology/NBIAP News Report. Special Issue on BT. December.
    2. Gould, F. 1995. The empirical and theoretical basis for Bt resistance management. Information Systems for Biotechnology/NBIAP News Report. Special Issue on BT. December.



    3. Adamczyk, J. J., Holloway, J. W., Church, G. E., Leonard, B. R., and Graves, J. B. 1998. Larval survival and development of the fall army worm (Lepidoptera : Noctuidae) on normal and transgenic cotton expressing the Bacillus thuringiensis CryIA(c) partial derivative-endotoxin.  Journal of Economic Entomology 91: 539-545.
    4. Bharathan, G. 2000. Bt-cotton in India: anatomy of a controversy. Current Science 79:1067-1075.
    5. Chakrabarti, S. K., Mandaokar, A., Kumar, P. A., and Sharma, R. P. 1998. Efficacy of lepidopteran specific delta-endotoxins of Bacillus thuringiensis against Helicoverpa armigeraJournal of Invertebrate Pathology 72: 336-7.
    6. de Maagd, R. A., Bosch, D., and Stiekema, W. 1999. Bacillus thuringiensis toxin mediated insect resistance in plants.  Trends in Plant Science 4: 9-13.
    7. Genetically modified Pest protected plants: science and regulation. 2000. National Research Council, National Academy Press. Washington, DC. USA.
    8. Gujar, G. T., Kumari, A., Kalia, V., and Chandrashekar, K.  Spatial and temporal variation in susceptibility of the American bollworm, Helicoverpa armigera (Huebner) to Bacillus thuringiensis var. kurstaki in India.  2000. Current Science 78:995-1001.
    9. Koziel, M. G. et al. 1993. Insecticidal crystal proteins of B. thuringiensis. Biotechnology and Genetic Engineering Review 11: 173-4.
    10. Kranthi, K. R., Kranthi, S., Alis, S., and Banerjee, S. K. 2000. Resistance to CrylAc delta-endotoxin of Bacillus thuringiensis in a laboratory selected strain of Helicoverpa armigera (Huebner). Current Science 78:1001-1004.
    10a.  Liu, Y-B, Tabashnik, B. E., Dennehy, T. J., Patin. A. L., Bartlett, A. C.  1999. Development time and resistance to Bt crops. Nature 400:519.
    11. Luttrell R. G, Wan L., Knighten K. J. 1999. Variation in susceptibility of noctuid (Lepidoptera) larvae attacking cotton and soybean to purified endotoxin proteins and commercial formulations of Bacillus thuringiensis.  Economic Entomology 92: 21-32.
    12. Sharma, M.K. 1998. In The Hindu. Nov. 26.
    13. Sundaramurthy V. T., and Gahukar R.T. 1998. Integrated management of cotton insect pests in India.  Outlook On Agriculture. 27: 261-269.



    14. Biotech Activists Oppose the Terminator Technology.  1998. Rural Advancement Foundation International (RAFI) Newsletter. March 13
    15. Sengupta, S. 1999. Cotton: the Death Harvest.  Health for the Millions, New Delhi.
    16. Sharma, D. 1999. Farmer suicides: the pest in pesticidesBusinessline.  August 24
    17. Shiva, V., Emani, A., and Jafri, A. H. 1999. Globalisation and threat to seed security: case of transgenic cotton trials in India. Economic and Political Weekly. Mar 6: 601-613.
    18. Sridhar, V. 1998. Lessons from a tragedy. Frontline, Sep 12 .
    19. United States Department of Agriculture. 1999. The Control of Plant Gene Function.
    20. Whitacre, B. 1998. The Amazing Seed. The American Seed Trade Association Newsletter, October.




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