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| 转Bt基因棉田害虫和天敌组成及优势类群时序动态 | |
| 引用本文： | 张龙娃,柏立新,韩召军,束春娥,董双林.转Bt基因棉田害虫和天敌组成及优势类群时序动态[J].棉花学报,2005,17(4):222-226. |
| 作者姓名： | 张龙娃 柏立新 韩召军 束春娥 董双林 |
| 作者单位： | 1. 江苏省农业科学院植物保护研究所,南京,210014;南京农业大学昆虫学系,南京,210095 2. 江苏省农业科学院植物保护研究所,南京,210014 3. 南京农业大学昆虫学系,南京,210095 |
| 基金项目： | 国家十五攻关项目(长江流域棉区棉花重大病虫害可持续控制技术2001-BA509B05-02) 农业部农业结构调整重大技术研究专项(2003-05-02B) |
| 摘 要： | 在系统调查棉田节肢动物的基础上,就长江流域下游棉区种植转Bt基因棉对棉田害虫和天敌组成、数量以及时序动态的影响进行了分析。结果表明,转Bt基因棉田和常规棉田基本接近,均以棉蚜为害虫优势种,天敌优势种为草蛉、龟纹瓢虫、三突花蛛。按照营养关系分析表明,转Bt基因棉田和常规棉田均以植食性类群在营养层中占绝对优势,其次是捕食性天敌类群,而寄生性天敌较少;刺吸类害虫是植食性害虫的优势功能集团,瓢虫类、蜘蛛类和草蛉类为优势捕食性类群。转Bt基因棉能够显著减少棉田鳞翅目等靶标害虫类群的发生,而对其它非靶标害虫如刺吸类害虫以及棉田天敌发生没有显著影响。 |
| 关 键 词： | 转Bt基因抗虫棉 害虫 天敌 群落组成 时序动态 |
| 文章编号： | 1002-7807(2005)04-0222-05 |
| 修稿时间： | 2004年12月13 |
Composition of Pests and Natural Enemies and Dynamics of Dominant Groups in Transgenic Bt Cotton Fields |
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| ZHANG Long-wa,BAI Li-xin,HAN Zhao-Jun,SHU Chun-e,DONG Shuang-lin.Composition of Pests and Natural Enemies and Dynamics of Dominant Groups in Transgenic Bt Cotton Fields[J].Cotton Science,2005,17(4):222-226. | |
| Authors: | ZHANG Long-wa BAI Li-xin HAN Zhao-Jun SHU Chun-e DONG Shuang-lin |
| Abstract: | In order to study the influence of transgenic Bt (Bacillus thuringiensis) cotton on the structure of arthropod community and the dominant groups in Yangtze River Valley, a system survey was conducted in Nanjing, Jiangsu Province, in 2002. Three transgenic Bt cotton varieties (Sukang 103, GK22 and sGK321) and one common cotton variety (Simian 3) were adopted. The component species in transgenic and common cotton fields were similar. But there was a little difference in the individual numbers of some special species. The dominant pests in transgenic cotton fields were aphids (Aphis gossypii Glover), cotton whitefly (Bemisia tabaci Gennadius) and leafhopper (Empoasca biguttula Ishida) , whereas aphids, cotton leafroller (Sylepta derogata Fabricius) were the dominant pests in common cotton fields. Ladybugs (Propylaea japonica Thunberg) , green lacewings (Chrysopa sep-tempunctata Wesmael) , and spiders (Misumeenops tricuspidatus Fabticius) were the dominant species of natural enemies in all of cotton fields. Based on their trophic relationships and taxonomy relationship, the field arthropods including pest groups, natural enemy groups and neutral arthropods were divided into four nutrient classes, six guilds and 26 groups. The phytophagous class is the dominant class in the four nutrient classes, following by the predacious class. In the phytophagous class, sucking pests takes the first place in abundance, in both Bt-cotton and common cotton fields. In the predacious groups, ladybuds, spiders and lacewings are the major natural enemy groups. The dynamics of the major pest groups and natural enemy groups were displayed following the sampling times se- quence, which was with the growth of cotton plants. The biggest difference between the Bt cotton and common cotton fields is the population of caterpillar, which is significantly lower than the later, for the good control of Bt cotton on target pests. While there is little difference for the sucking pest groups and the natural enemies between the Bt cotton and common cotton fields. These results indicated that transgenic Bt cotton could depress the population of caterpillar, but had little effect on the natural enemies. |
| Keywords: | transgenic Bt cotton pests natural enemies composition population dynamic |
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