Farmers who once sowed GM oilseed rape on their fields will be unable to grow non-GM rape for at least 9 years, a study of UK scientists concludes. Even though the GM seed would be reduced by 95% over these years it "would be highly likely to result in the presence of more than two volunteer plants per square meter in a rape crop sown 9 years after the HT crop. This density would exceed the European Union threshold of 0.9% adventitious presence of GM seeds in a non-GM crop."</p><p><a href="http://news.independent.co.uk/uk/environment/article318238.ece">The Independent (10 Oct 05): GM crop ruins fields for 15 years</a></p><p><a href="http://www.journals.royalsoc.ac.uk/index/6PTR0X3YR8Y9BYFE.pdf">Royal Society, Proceedings: Biological Sciences: Persistence of seeds from crops of conventional and herbicide tolerant oilseed rape (Brassica napus)</a>