【摘要】 【目的】重金属污染是目前全球面临的重要环境问题。本研究旨在评价镉污染对迁飞性昆虫甜菜夜蛾Spodoptera exigua飞行能力的影响。【方法】利用昆虫飞行信息采集系统对不同浓度镉胁迫下(0,0.20,0.80,3.20和12.80 mg/kg)不同日龄(1,3,5和7日龄)和不同性别甜菜夜蛾成虫飞行能力进行了研究。【结果】不同浓度镉胁迫对不同日龄和不同性别甜菜夜蛾成虫飞行能力的影响存在显著差异。以0.20 mg/kg处理下3日龄雌成虫飞行能力最强,平均飞行距离最远,为36.96 km。在所测日龄中,0.20 mg/kg的低浓度镉处理与对照相比飞行能力差异不显著;随着镉浓度的升高,雌雄成虫飞行能力均显著下降;重金属镉胁迫对雄虫飞行能力的抑制作用比对雌虫更加明显。【结论】镉胁迫对不同日龄和不同性别甜菜夜蛾成虫飞行能力具有显著影响。更多还原

【Abstract】 【Aim】Heavy metal pollution has become one of important environmental issues globally. This study aims to evaluate the effects of cadmium exposure on the flight performance of the beet armyworm,Spodoptera exigua,a migratory insect. 【Methods】Insect flight information system was used to study the flight performance of female and male adults of S. exigua at different ages( 1,3,5 and 7 day-old),which were fed with the artificial diets containing different concentrations of cadmium( 0,0. 20,0. 80,3. 20 and 12. 80 mg/kg),respectively. 【Results 】 There were significant differences in the flight performance of S. exigua adults exposed to different concentrations of cadmium. The 3 day-old female adults stressed by low concentration of cadmium( 0. 20 mg/kg) were the best fliers with the longest average flight distance( 36. 96 km). The flight performance of S. exigua adults exposed to 0. 20 mg/kg cadmium was not significantly different from that of the control. With the increase of cadmium concentration,the flight performance of both male and female adults decreased significantly. The negative effects of heavy metal cadmium stress on the performance of male adults were more obvious than on that of female adults. 【Conclusion】Different concentrations of cadmium stress have significant effects on the flight performance of S. exigua adults of different ages and different sexes.更多还原