Parasitization performance of Trichogramma cacoeciae, T-evanescens and T-brassicae (Hym. Trichogrammatidae) reared on the embryos of Ephestia kuehniella Zell. (Lep Pyralidae) killed by freezing
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Date
2002
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Mich Entomol Soc
Access Rights
info:eu-repo/semantics/closedAccess
Abstract
A 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.
Description
Keywords
Minutum Riley Hymenoptera, Quality Assessment, Host, Eggs, Fecundity, Longevity, Pretiosum
Journal or Series
Great Lakes Entomologist
WoS Q Value
Q4
Scopus Q Value
Volume
35
Issue
2
