温度和光周期对淡足侧沟茧蜂寄生和雌性比率的影响
Laboratory of Protected Horticultural 17The influence of temperature and photoperiod on parasitism and female ratio of Microplitis pallidipes
季香云1，2**,化丽丹1，3 ,蒋杰贤1***,万年峰1,杨建军1
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作者单位：1.上海市农业科学院生态环境保护研究所上海市设施园艺技术重点实验室上海201106；(2.湖南农业大学生物安全科技学院长沙410128； 3.扬州大学植保与园艺学院扬州225009
中文关键词： 淡足侧沟茧蜂，温度，光周期，旋转回归设计，寄生率，雌性比率
英文关键词：Microplitis pallidipes， temperature， photoperiod， the quadratic rotary combination design， parasitic rate， female ratio
中文摘要： 运用2因素2次回归正交旋转组合设计，研究了温度和光照周期对淡足侧沟茧蜂Microplitis pallidipes Szepligeti寄生率和性比的影响，并建立了回归模型，旨在为优化寄生蜂雌性比率、提高寄生率提供资料。主效分析表明，温度、光周期与寄生率呈抛物线关系，编码值为零水平取值时，寄生率达到最大；温度对雌性比率的影响大于光周期。交互作用表明，温度和光周期对斜纹夜蛾Spodoptera litura Fabricius幼虫被寄生率有明显的负交互效应，而对侧沟茧蜂雌性比率的交互作用不明显。通过对模型进行模拟，温度为28℃、光周期L∶D＝12∶12时，寄生率达到最大（71.89%）；温度为33.7℃、光周期为L∶D＝12∶12时，雌性比率达最高值（0.57）。
英文摘要：The influence of temperature and photoperiod on the parasitism rate of the larvae of Spodoptera litura Fabricius and the female ratio of Microplitis pallidipes Szepligeti was evaluated by quadratic orthogonal rotation regression design with two factors， producing two models. These models can provide a basis for optimizing the breeding environment of M. pallidipes. Main effects analysis showed that the relationship between temperature， photoperiod and parasitic rate was parabolic. When the coding value was zero， the parasitic rate became maximal. Temperature was a more important influence on female ratio than photoperiod. Interaction effects analysis showed a significantly negative relationship between temperature and photoperiod on the parasitic rate of S. litura larvae， however， the influence of temperature and photoperiod on the female ratio of M. pallidipes was not clear. The parasitism rate of S. litura reached its maximum (71.89%) at a temperature of 28℃ and photoperiod of L∶D＝12∶12 whereas the female ratio of M. pallidipes reached its maximum (0.57) at a temperature of 33.7℃ and a photoperiod of L∶D＝12∶12.