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| 棉铃虫对转Bt基因抗虫棉的为害损失及其防治指标研究 | |
| 引用本文： | 徐文华,王义成,李红阳,吉荣龙.棉铃虫对转Bt基因抗虫棉的为害损失及其防治指标研究[J].江西农业学报,2003,15(2):21-25. |
| 作者姓名： | 徐文华 王义成 李红阳 吉荣龙 |
| 作者单位： | 1. 江苏沿海地区农科所,江苏,盐城,224002 2. 江苏省盐都县郭猛镇农技站,江苏,盐都,224014 3. 江苏省农业科学院,新洋试验站,江苏,盐城,224031 |
| 基金项目： | 江苏省"十五"农业攻关资助项目(B6-101)、盐城市科技发展计划项目(YK2001149). |
| 摘 要： | 采用田间接虫试验的方法,研究了江苏沿海地区棉铃虫对转Bt基因抗虫棉的为害损失与防治指标。结果表明,转Bt棉田的残虫量、蕾铃被害率和产量损失均随着接虫量的加大而增加;接虫量与残虫量的关系2代呈对数增长,3、4代表现为直线增长;转Bt棉田棉铃虫2、3、4代的防治指标分别为每百株有3龄左右幼虫15、8和10头或蕾铃被害率依次达1.18%、2.70%和3.30%。 |
| 关 键 词： | 棉铃虫 转Bt基因抗虫棉 为害损失 防治指标 |
| 文章编号： | 1001-8581(2003)02-0021-05 |
| 修稿时间： | 2003年5月27日 |
Study on Damage of Helicoverpa armigera to Transgenic Bt Cotton and Its Control Index |
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| Abstract: | The yield loss of transgenic Bt cotton caused by cotton bollworm (Helicove rpa armigera) and control index of this insect in coastal cotton area of J iangsu province were studied through inoculation experiment. The results indicat ed that the number of remnant bollworm, rate of injured bud and boll, and yield loss all increased as the number of inoculated bollworm increased; the correlati on between the number of remnant bollworm and the number of inoculated bollworm was logarithmic in the second generation, while it was linear in the third and fourth generation; the control index of bollworm in the second, third and fourt h generation was 15, 8 and 10 heads of 3 instar larvae per 100 plants respective ly, or 1.18%, 2.70% and 3.30% of injured bud and boll respectively. |
| Keywords: | Cotton bollworm Transgenic Bt cotton Yield loss Control index |
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