Modified genes from crops in a GM crop trial have transferred into local wild plants, creating a form of herbicide-resistant "superweed".</p><p><a href="http://www.guardian.co.uk/uk_news/story/0,,1535363,00.html">The Guardian: GM crops created superweed, say scientists</a></p><p><a href="http://www.nature.com/news/2005/050725/full/050725-2.html">Nature: Transgenic crop may have bred with wild weed</a>