两年前的科学论文称一种转基因玉米能够杀死黑脉金斑蝶的幼虫,由此引起关于转基因作物安全性的讨论接连不断。如今,新的研究表明,当初被称为有抗害能力的转基因玉米事实上对黑脉金斑蝶并没有影响。但是,这并不意味着对转基因食品安全性的争论从此结束。这场争论的焦点是BT转基因玉米。1999年5月,英国《自然》杂志刊登了美国康奈尔大学副教授约翰·罗西的一篇论文,引起世界关注。论文说,BT玉米被植入一种特殊基因,可使玉米花粉含有毒素,依靠玉米地里 Two years ago, a scientific paper called a genetically engineered corn that kills larvae of monarch butterflies, triggering a steady stream of discussions about the safety of genetically engineered crops. Today, new research shows that what was once called defensive maize actually has no effect on monarch butterflies. However, this does not mean that the debate over the safety of GM foods ends. The focus of this debate is BT Genetically Modified Corn. In May 1999, a paper published by John Naturals, an associate professor at Cornell University in the United States, was published in the journal Nature in the United Kingdom, arousing world attention. The paper said that BT corn is implanted in a special gene, corn pollen can contain toxins, relying on corn