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Publication
Effects of deltamethrin on the reproduction of Trichogramma cordubensis (Hymenoptera: Trichogrammatidae)
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Advisor(s)
Abstract(s)
The influence of deltamethrin on the reproduction of Trichogramma cordubensis, a thelytokous egg parasitoid, was investigated by studying egg maturation and daily fecundity of insecticide treated wasps and offspring emergence rates. The insecticide was applied to the parasitoids at
the prepupal stage within its host eggs (Ephestia kuehniella ). The total number of parasitized eggs per female during the first 7 days was not significantly influenced by the tested concentrations of deltamethrin. Prevalence of parasitism during this period had a similar pattern between deltamethrin treatments and the control. In addition, the mean number of mature eggs observed per female per day was significantly correlated to mean daily fecundity, regardless of the treatments. Offspring emergence was significantly influenced by the insecticide
treatments experienced on their progenitors, decreasing significantly at 48 and 72 h for the
highest tested concentration of deltamethrin (23.6 mg [a.i.]/L). Despite that, deltamethrin had no adverse effects on the reproduction of treated wasps, particularly when was applied at the concentration recommended by the manufacturer (12.5 mg [a.i.]/L).
Description
Copyright © 2006, Taylor & Francis.
Keywords
Trichogramma Deltamethrin Offspring Emergence Egg Maturation Fecundity
Pedagogical Context
Citation
"Biocontrol Science and Technology". ISSN 1360-0478. Volume 16, Issue 7, 2006, pp. 699-708(10).
Publisher
Taylor & Francis