草地螟成虫期补充营养与其生殖力的关系

Relationships between the nutritional contents and the fecundity of Loxostege sticticalis L. adults

[目的]明确草地螟成虫期营养质量与生殖力之间的关系,为探索草地螟综合治理的新途径提供理论依据。[方法]应用实验生物学技术室内研究了草地螟成虫羽化后逐日取食10%蜂蜜水(Ⅰ组)、5%蜂蜜水(Ⅱ组)、羽化后当日取食10%蜂蜜水,而后逐日取食清水(Ⅲ组)和羽化后逐日取食清水(Ⅳ组)4种营养液对成虫寿命和生殖力的影响。[结果]成虫期饲喂不同的营养物质对其产卵前期、产卵量与雌蛾平均寿命影响显著,但对雄蛾的平均寿命及卵的孵化率无显著影响。取食试验Ⅰ组的雌蛾其产卵前期(5.71 d)、产卵量(359.14粒/头)及平均寿命(21.0 d)高于Ⅱ组、Ⅲ组及Ⅳ组的;取食试验Ⅰ组、Ⅱ组的雌蛾,其产卵历期分别为10.578、.0 d,两处理间差异不显著;取食试验Ⅲ组、Ⅳ组的雌蛾,其产卵历期分别为4.0、3.14 d,两处理间虽无显著差异,却显著短于取食Ⅰ组、Ⅱ组的产卵历期。[结论]草地螟雌成虫期营养质量是影响草地螟种群变动的重要因素。

[Objective] It is aimed to understand the relationships between the compensatory nutrition and the fecundity of Loxostege sticticalis L., so as to find a new way to control the pest.[Method] The newly emerged moths of L. sticticalis L. were fed individually with four levels of compensatory nutrition, 10% honey dilution every day （I）, 5% honey dilution every day （Ⅱ）, 10% honey dilution the first day and then water the rest days （Ⅲ）, or water every day in the laboratory （Ⅳ）. [Result] The mean pre oviposition, fecundity and longevity of female moths fed by different nutritions were significantly different; the average in the treatment Ⅰ was higher than those of the treatments Ⅱ, Ⅲ or Ⅳ, and the mean preoviposition, fecundity and longevity of female adults in the treatment Ⅰ were 5.71 d, 359.14 eggs and 21.0 d, respectively. There were no obvious effects of compensatory nutrition conditions on male adult longevity and egg hatching rate. Furthermore, there were no significant differences on the ovipositional period of female adults between the treatment Ⅰ and Ⅱ, or the treatment Ⅲ and Ⅳ; their ovipositional period were 10.57 d and 8.0 d , 4.0 d and 3.14 d, respectively; but the differences between the treatment Ⅰand Ⅱ and the treatment Ⅲ and Ⅳ were significant. The female adult age specific oviposition probability were affected by the compensatory nutrition. [Conclusion] The compensatory nutrition was a key factor affecting the population dynamics.