硒对亚洲玉米螟生长发育的影响

Effects of selenium on the development of Ostrinia furnacalis(Guenée)

【目的】探讨硒对亚洲玉米螟Ostrinia furnacalis（Guenée）生长发育的影响。【方法】在实验室条件下以添加不同剂量（0.001、0.005、0.010、0.050、0.100、0.500、1.000 mg/kg）硒的人工饲料饲养亚洲玉米螟初孵幼虫。【结果】低浓度（0.001~0.100 mg/kg）硒对亚洲玉米螟的幼虫历期、蛹重、蛹历期具有促进作用。亚洲玉米螟在0.100 mg/kg浓度下生长状况最佳,其雄蛹重最大,雌雄蛹历期最短,雌雄成虫寿命最长,化蛹率和羽化率最高。高浓度（0.500~1.000 mg/kg）硒对亚洲玉米螟的雌雄蛹历期、雄蛾寿命、化蛹率和羽化率具有抑制作用。亚洲玉米螟在1.000 mg/kg浓度下生长状况最差,其幼虫历期最长,雌雄蛹重最小,蛹历期最长,成虫寿命最短,化蛹率和羽化率最低。【结论】低浓度硒对亚洲玉米螟的生长发育有促进作用,高浓度则表现为抑制作用。

[Objectives] To investigate the influences of selenium on the growth and development of the Asian corn borer（ACB）, Ostrinia furnacalis（Guenée）. [Methods] Neonate O. furnacalis larvae were reared on the artificial diet containing selenium at a series of concentrations（0.001, 0.005, 0.010, 0.050, 0.100, 0.500, 1.000 mg/kg） under the laboratory condition. [Results] Low concentrations（0.001-0.100 mg/kg） of selenium enhanced ACB development, i.e., shortened the larval duration, pupal duration and increased male and female pupal weight. At the concentration of 0.100 mg/kg of selenium, O. furnacalis exhibited the optimal growth characteristics, which resulted in the highest male pupal weight, the shortest male and female pupal duration, the longest male and female adult lifespan, the highest pupation rate and emergence rate. High concentrations（0.500-1.000 mg/kg） of selenium inhibited ACB development such as prolonged male and female pupal duration, shortened male adult lifespan, reduced pupation rate and emergence rate. At the concentration of 1.000 mg/kg of selenium, O. furnacalis exhibited the worst growth characteristics, which resulted in the longest larval and pupal duration, the lightest pupal weight, the shortest adult lifespan, the lowest pupation rate and emergence rate. [Conclusion] Low concentrations of selenium had promoting effects on the development of O. furnacalis, while high concentrations exerted inhibited influences on it.