Survey of the herbicides resistant weeds which may be invasive to Japan in USA

2009年，全世界农民种植了1.34亿公顷的转基因玉米、大豆和棉花。抗草甘膦转基因作物占转基因作物的85%。转基因作物几乎是草甘膦耐受（GT）大豆，玉米，棉花。美国早在1995年就开始种植转基因作物，但日本目前还没有转基因作物的商业化种植，抗草甘膦杂草在美国转基因作物田广泛蔓延。由于草甘膦抗性杂草的广泛存在，草甘膦除草剂的使用量大大增加，其它作用方式的除草剂也正式在GT大豆、玉米和棉花田使用。GEGT技术并不能解决杂草问题。我讨论了日本GT作物杂草控制技术的有效性。

Farmers in the world planted 134 million hectare of genetic modified (GM) corn, soybeans and cotton in 2009. Genetic modified with glyphosate tolerant (GT) crops accounted for 85% of genetic modified crops. GM crops are almost glyphosate tolerant (GT) soybean, corn, cotton. GT crops cultivation in USA were started from 1995, but GT crops in Japan are not commercially cultivated now.Glyphosate resistant weeds are spreading widely at the GT crops field in USA. Because of the widespread of glyphosate-resistant weeds, it is vastly increased the use of glyphosate herbicide and the used of other mode of action herbicides in GT soybeans, corn and cotton fields formally. GEGT technology does not solve the weed problem. I discussed the effectiveness of weed control technology on GT crops in Japan.