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【目的】研究取食转Bt+CpTI基因棉花的棉蚜Aphis gossypii Glover对普通草蛉Chrysopa carnea Stephens生长发育及繁殖力的影响,为转Bt基因抗虫棉花的推广和应用提供理论支持。【方法】普通草蛉取食转Bt+CpTI棉花SKG321和对照品种石远321棉花上的棉蚜后,对普通草蛉生长发育情况进行研究,并对其幼虫、蛹的存活率和成虫的羽化率及产卵量进行分析。【结果】取食转Bt+CpTI棉花上的棉蚜对普通草蛉的各龄幼虫发育历期、蛹期和产卵前期无不利影响;处理与对照间各龄幼虫存活率、蛹的存活率和成虫羽化率之间没有显著差异;取食转Bt+CpTI棉花上棉蚜的普通草蛉单雌日产卵量与对照相比没有减少,而25 d内的单雌总产卵量与对照相比差异亦不显著。【结论】取食转Bt+CpTI棉花上的棉蚜对普通草蛉的生长发育及繁殖力无负面影响。
【Objective】 The objective of this study was to investigate the effects of Aphis gossypii Glover fed on transgenic Bt + CpTI cotton on the growth and fecundity of Chrysopa carnea Stephens and to provide theoretical support for the promotion and application of transgenic Bt cotton. 【Method】 The growth and development of common bream were studied after feeding on cotton aphid Bt + CpTI cotton SKG321 and the control variety Shiyuan 321 cotton, and the survival rate of larvae and pupae and the emergence of adults Rate and fecundity were analyzed. 【Result】 The results showed that the aphids on Bt + CpTI cotton did not adversely affect the developmental stages, pupal stage and pre-oviposition stage of larvae of common grass larvae. The larval survival rate, pupal survival rate There was no significant difference between adult females and adult fecundity rate; the average number of fecundity per females fed on cotton aphid fed on Bt + CpTI cotton did not decrease compared with the control, while the number of fecundity per females within 25 days The difference was not significant. 【Conclusion】 Aphis gossypii on cotton fed with Bt + CpTI had no negative effect on the growth and fecundity of common weeds.