温度和光周期对甜菜夜蛾发育历期和繁殖的影响

本文测试了不同温度(22℃、25℃、28℃)和不同光周期(LD11:13,LD12:12,...,LD15:9)对甜菜夜蛾发育历期和繁殖的影响。结果表明:随着温度升高,甜菜夜蛾卵期、幼虫期、蛹期、蛹重都呈下降趋势,温度对卵期、幼虫期、蛹期、蛹重都有显著影响(P=0.000)。随着温度升高,每雌产卵量呈上升趋势,温度对每雌产卵量有显著影响(P=0.004);随着温度升高,雌虫寿命呈下降趋势,温度对雌虫寿命有显著影响(P=0.001);雄虫寿命也呈下降趋势,但温度对雄虫寿命没有显著影响(P=0.289)。在22℃、25℃、28℃条件下,在所有的光周期下,甜菜夜蛾滞育率都为0,没有光周期反应。在22℃条件下,不同光周期幼虫期、蛹期存在显著差异(P=0.002,P=0.011),蛹重没有显著差异(P=0.171);在25℃条件下,不同光周期幼虫期、蛹期、蛹重都无显著差异(P=0.973,P=0.069,P=0.862);在28℃条件下,不同光周期幼虫期没有显著差异(P=0.207),蛹期、蛹重存在显著差异(P=0.000,P=0.006)。

Effect of Temperature and Photoperiod on Developmental Period and Reproduction of Spodoptera Exigua

Effect of temperature and photoperiod on developmental period and reproduction of Spodoptera exigua.The results showed that egg stage,larval stage,pupal stage,and pupal weight declined as the temperature increased from 22℃ to 28℃.Temperature had significant effects on egg stage,larval stage,pupal stage,and pupal weight（P=0.000）.Egg production per female increased as the temperature increased,the temperature had significant effects on egg production per female（P=0.004）.The longevity of female declined as the temperature increased,the temperature had significant effects on the longevity of female（P=0.001）.The longevity of male also declined as the temperature increased,but the temperature had no significant effects on the longevity of male（P=0.289）.The diapause of Spodoptera exigua is 0% in different photoperiod at 22℃、25℃ and 28℃.It is not photoperiodic response.It had significant effects on larval stage and pupal stage（P=0.002,P=0.011） and had not significant effects on pupal weight（P=0.171） in different photoperiod at 22℃.It had not significant effects on larval stage、pupal stage and pupal weight in different photoperiod at 25℃（P=0.973,P=0.069,P=0.862）.It had not significant effects on larval stage（P=0.207） and had significant effects on pupal stage and pupal weigh（P=0.000,P=0.006） in different photoperiod at 28℃.