能抵御虫害的棉花美国芒塞特尔化学公司的科学家近年研究出一种新的棉花品种。这种棉花在生长过程中不需施用任何杀虫药,能抵御害虫的侵袭。这种棉花叫做“基因移植棉花”,简称“BT 棉花”,它是把娥螺——苏云金细菌的基因移植到棉花上培育而成的。据试验,用 BT 棉花的花瓣喂养棉铃幼虫,不久,幼虫就会大量死亡。如把这种棉花和烟草套种在一块田里, Cotton that can withstand insect pests In recent years, scientists at Mangsell Chemical Company of the United States have developed a new cotton variety. This cotton does not require any insecticide to be applied during growth and can resist pests. This cotton is called “cotton” gene transfer, referred to as “BT cotton”, which is transplanted to the cotton Gerbera - soyoil gene culture. According to the experiment, bollworm larvae were fed with petals of BT cotton and soon larvae died in large numbers. If this cotton and tobacco intercropping in a field,