ABSTRACT Exorista japonica (Townsend) is a polyphagous parasitoid that attacks several lepidopteran pest species and it has been well known as a powerful natural enemy showing the high parasitism on noctuid larvae. For usage of this parasitoid in biological control of insect pest larvae, we established the effective storage condition for stockpiling this parasitoid. Emergence rate of E. japonica pupae stored at 4.0°C, emergence rate was higher than that at other cold storage temperature conditions. Storage at 10.0°C was deleterious to the parasitoids’ emergence below 50.0% emergence rate. Preconditioning by exposing pupae to 10.0°C for 72 h before storage at 4.0°C showed a significant low emergence rate, even though female longevity was relatively high. Cold storage durations had a significant effect on emergence, fecundity, and female longevity. After 4 weeks storage at 4.0°C, emergence rate significantly decreased. The fecundity and longevity of female significantly decreased even though pupae were stored at 4.0°C for only 1 week. Cold storage had an effect on sex ratio, fecundity, and female longevity of F1 progeny. The proportion of females in F1 progeny produced by cold stored individuals was much higher than that of the control. Cold storage may decrease the quality of parasites. However, E. japonica pupae can be successfully stored up to 3 weeks so that sufficient supply of this parasitoid at a release time would be possible through a mass production with a cold storage.

中文翻译：

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冷藏对夜蛾幼虫重要寄生蜂 Exorista japonica (Townsend)(双翅目：Tachinidae) 蛹活力的影响

摘要 Exorista japonica (Townsend) 是一种多食性寄生蜂，攻击多种鳞翅目害虫，是众所周知的强大天敌，对夜蛾幼虫具有高度寄生性。为利用该拟寄生物对害虫幼虫进行生物防治，为该拟寄生物的储存建立了有效的储存条件。E. japonica 蛹在 4.0°C 条件下的出苗率，出苗率高于其他冷库温度条件下的出苗率。10.0°C 储存对寄生蜂的出苗率低于 50.0% 是有害的。通过将蛹暴露于 10.0°C 72 小时，然后在 4.0°C 储存前进行预处理，显示出显着的低羽化率，尽管雌性寿命相对较长。冷藏时间对羽化、繁殖力和雌性寿命有显着影响。在 4.0°C 下储存 4 周后，出苗率显着下降。即使蛹在4.0°C下仅储存1周，雌性的繁殖力和寿命也显着下降。冷藏对F1后代的性别比、繁殖力和雌性寿命有影响。冷藏个体产生的F1后代中雌性比例远高于对照。冷藏可能会降低寄生虫的质量。然而，E. japonica 蛹可以成功储存长达 3 周，因此通过冷藏的大规模生产，可以在释放时提供足够的这种寄生蜂。冷藏对F1后代的性别比、繁殖力和雌性寿命有影响。冷藏个体产生的F1后代中雌性比例远高于对照。冷藏可能会降低寄生虫的质量。然而，E. japonica 蛹可以成功储存长达 3 周，因此通过冷藏的大规模生产，可以在释放时提供足够的这种寄生蜂。冷藏对F1后代的性别比、繁殖力和雌性寿命有影响。冷藏个体产生的F1后代中雌性比例远高于对照。冷藏可能会降低寄生虫的质量。然而，E. japonica 蛹可以成功储存长达 3 周，因此通过冷藏的大规模生产，可以在释放时提供足够的这种寄生蜂。