Özder, N2024-06-122024-06-1220020090-0222https://hdl.handle.net/20.500.14551/25173A mass rearing system for Trichogramma spp. using host eggs killed before parasitisation could improve current parasitoid production methods by making the system more efficient. Parasitism rates of Trichogramma cacoeciae Marchall, Trichogramma evanescens Westwood and T brassicae Bezdenco reared on dead embryos of E. kuehniella kept at -20 degreesC during 1, 2 and 3 h were compared. The lowest parasitization rate was obtained on E. kuehniella eggs which had been kept at -20 degreesC for 3 h. Parasitization rates were 64%, 65.60% and 63.60% for T cacoeciae, T evanescens and T brassicae, respectively, on E. kuehniella eggs kept at -20 degreesC for 1 h. Subsequent trials focused on fitness of T cacoeciae, T. evanescens and T. brassicae reared on killed embryos of E. kuehniella. Percentage of parasitized eggs and longevity of females were quantified. Exposure of eggs to low temperatures in a freezer reduced fecundity and longevity of females.eninfo:eu-repo/semantics/closedAccessMinutum Riley HymenopteraQuality AssessmentHostEggsFecundityLongevityPretiosumArticle352107111Q4WOS:000186656500003