期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Study of the Population Dynamics Changes of the Benficial and Injurious Living Beings on the Field of Bt Cotton-33B
摘要/Abstract
摘要：
由于 Bt棉第一代和第二代品种对棉铃虫有高度的抗性 ,基本不再对棉铃虫采取化学用药防治 ,使棉田用药量减少了 80 %以上 ,棉田天敌种群大幅度上升 ,促进了棉田生态结构的变化 ,使益害比向生态平衡方向发展 .
Abstract：
Because the first and second generation of Bt cotton-33B is highly resistant to cottonbollworm ( Heliothis armigera Hubner) , it can prevent the cotton losses by cotton bollworm and 80percent of insecticide apllication for controlling cotton bollworm can be reduced by planting Bt cotton-33B. The enemy population increases largely,so the ecological environment can develop toward balance inBt cotton-33B fields.