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棉铃虫、红铃虫等害虫对棉花生产的危害越来越大,人们为防治这些害虫千方百计地找寻着方法。据了解,近日,中国农业大学教授、博士生导师张青文宣布:他领导的课题组将抗虫基因转入棉花植株内共生微生物即棉花抗棉铃虫内生工程菌,通过工程菌在植物体内或根围的定植、扩增,系统表达杀虫毒蛋白,从而赋予了棉花植株本身以抗虫性。据张青文教授介绍,他们于1999年6月至9月在山东进行了防治棉铃虫的大田试验,结果表明:棉花抗虫工程菌防治棉铃虫的效果始终很稳定,处理一次就可以使棉株全年抗虫。棉铃虫第二代发生期,防效在80%以上,与功夫菊酯相近;棉铃
Cotton bollworm, pink bollworm and other pests on the cotton production more and more harm, people do everything possible to find ways to control these pests. It is understood that, recently, China Agricultural University professor and doctoral tutor Zhang Qingwen announced: the group led by his insect-resistant genes will be transferred into cotton plant symbiotic microorganisms that cotton bollworm endogenous engineering bacteria, through the engineering bacteria in the plant or root Wai colonization, amplification, the system of insecticidal protein expression, giving the cotton plant itself to insect resistance. According to Professor Zhang Qingwen introduced in June 1999 to September in Shandong, they conducted a field trial on the control of cotton bollworm. The results showed that the effect of cotton insect-resistant engineering bacteria to control cotton bollworm has always been very stable, Year insect. The second generation of cotton bollworm occurred, the control effect of more than 80%, similar to the krypton ester; cotton bollworm