我国是继美国之后第二个研制成功抗虫棉的国家。我们国家研制的抗虫棉,目前已进入试验示范和品种审定阶段,条件可能的话,到1999年可种到700万亩。为了防治昆虫对目前这种单基因抗虫棉产生抗性,我国又研究了双基因抗虫棉,目前已进入田间试验,而国外尚未见到双基因棉田间试验的报道。 My country is the second country to successfully develop insect-resistant cotton after the United States. The insect-resistant cotton developed in our country has now entered the phase of trial demonstration and species approval. If possible, it will grow to 700 million mu in 1999. In order to prevent and control insects on the current single-gene insect-resistant cotton resistance, China has also studied the double-gene insect-resistant cotton, has now entered the field trials, but abroad has not yet seen the double-gene cotton field trials reported.