Instrument fibre tests indicate that there is no difference between the fibre from transgenic Bt cotton and non transgenic. However there is assumed concern from the spinning and textile sector.

In March 1995 the Cotton Research and Development Corporation (CRDC) asked the Centre for International Economics to prepare a report on the cotton industry and its economic impact.

The work has identified condensed tannin (CT) as occurring in cottonseed hulls but not in cottonseed kernels. Approximately 20% of the CT in cottonseed hulls is extractable and 80% is bound to protein and fibre.