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棉铃虫是世界性重要农业害虫,条件适宜时常大面积暴发,使棉花、玉米、花生、豆类、蔬菜、花卉等生产损失严重。由于长期采用化学防治,已使棉铃虫的抗药性不断增加。尽管转基因棉的大面积种植暂时缓解了棉铃虫对化学农药的抗性发展,但在棉花生长后期,由于Bt蛋白的表达量降低,常造成3、4代棉铃虫发生严重,仍需进行药剂防治。基于目前甲胺磷等5种高毒农药的禁用政策,急需筛选出一些适合目前种植背景,对棉铃虫高效、低毒并对天敌安全的农药替代品种。
The cotton bollworm is an important agricultural pest in the world. When the conditions are suitable, large-scale outbreaks occur frequently, causing serious losses in production such as cotton, corn, peanuts, beans, vegetables and flowers. As long-term chemical control, cotton bollworm resistance has been increasing. Although large-area cultivation of transgenic cotton temporarily relieved the development of resistance to chemical pesticides in cotton bollworm, the late stage of cotton growth often resulted in severe 3,4-day-old cotton bollworm due to the decrease of Bt protein expression, . Based on the current banned policies of 5 highly toxic pesticides such as methamidophos, some pesticide alternatives that are suitable for the current planting background and are highly efficient, low toxic and safe for natural enemies are screened out urgently.