Kenya: trials with GM sweet potato failed
Field trial that lasted for three years on virus resistant GM sweet
potato failed in Kenya. The GM sweet potato were susceptible to viral diseases. Additionally, a conventional potato variety gave a higher yield. The GM sweet potato resulted from a nine-year lasting project, which costs 6 million US dollars, funded by the company Monsanto together with the world banc and US government.
A gene coding for the envelope protein of the virus should provide
the virus resistance. However, viral diseases are not the main plant
pest but rather bugs.
(The Nation 01/29/04, cited from GENET 02/02/04;
The New Scientist, Vol 181 No. 2433, 7 February 2004).