ArticleScientific reports2026
Optimizing cold storage of Sitotroga cerealella eggs for the mass rearing of Trichogrammatoidea bactrae: Effects on reproductive performance of parent and progeny.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Improving effective cold storage techniques for maintaining factitious host eggs without adversely affecting their quality and the performance of emerged parasitoids is essential. Therefore, this study investigated the effects of different storage temperatures (-2 °C, 2 °C, 4 °C, and 8 °C) and durations (1-25 days) on the quality of Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae) eggs and the reproductive performance of both parents and offspring of Trichogrammatoidea bactrae Nagaraja (Hymenoptera: Trichogrammatidae). This parasitoid demonstrated the ability to parasitize cold-stored eggs, albeit at varying rates influenced by temperature and storage duration. Storage at 4 °C sustained egg quality and parasitoid performance for up to 25 days, however, optimal results of high parasitism rates (> 93%), adult emergence (> 96%), and female proportions (> 75%) were specifically maintained for 19 days. Additionally, storage at 2 °C held host suitability for 13 days. These trends were consistent for both parental and progeny generations. In contrast, eggs stored at 8 °C, exhibited parasitism rates of approximately 85% for 9 days, dropping to 54% by day 17 and failing completely by day 19. Conversely, storage at - 2 °C caused rapid deterioration of host egg quality after 5 days, reducing parasitism (83.47%) and significantly reducing parental (F
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