Hougardy Evelyne, Hogg Brian N
Invasive Species and Pollinator Health Research Unit, USDA-ARS, Albany, CA 94710, USA.
Insects. 2022 Nov 2;13(11):1010. doi: 10.3390/insects13111010.
Manipulating the factors that influence progeny production and sex ratio in parasitoids can help maximize the production of quarantine bioassays and/or mass releases. In a series of experiments, we studied the effects of several factors on offspring production and sex ratio in the parasitoid (Hymenoptera: Scelionidae), a candidate biological control agent for (Hemiptera: Pentatomidae). Progeny production was influenced by maternal age and dropped when females were 24 or 28 days old and decreased on the second day of exposure. Overall, the offspring sex ratio was highly variable in and was affected by the duration of exposure, with higher proportions of females emerging after one day of exposure than after two days, but was not affected by female density, female age/host deprivation, or temperature during oviposition. Progeny production was affected by the temperature during oviposition and was highest at 26.6 °C. The results indicate that production of can be maximized at one day of exposure, using females that are less than 24 d old, and at temperatures of around 26 °C.
操控影响寄生蜂后代产量和性别比例的因素，有助于最大限度地增加检疫生物测定和/或大规模释放的产量。在一系列实验中，我们研究了几个因素对寄生蜂（膜翅目：缘腹细蜂科）后代产量和性别比例的影响，该寄生蜂是一种用于防治（半翅目：蝽科）的候选生物防治剂。后代产量受母体年龄影响，当雌性为24或28日龄时产量下降，且在暴露的第二天产量降低。总体而言，该寄生蜂的后代性别比例变化很大，受暴露持续时间影响，暴露一天后羽化出的雌性比例高于两天后，但不受雌性密度、雌性年龄/宿主剥夺或产卵时温度的影响。后代产量受产卵时温度影响，在26.6℃时最高。结果表明，使用年龄小于24天的雌性，在约26℃的温度下暴露一天，可以使该寄生蜂的产量最大化。
