Life table parameters of the parasitoid Cephalonomia tarsalis (Hymenoptera : Bethylidae) and its host the saw-toothed grain beetle Oryzaephilus surinamensis (Coleoptera : Silvanidae)
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Department of Agriculture & Agrotechnology, Gaiopolis, University of Thessaly, Larissa, Greece
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Submission date: 2019-06-05
Acceptance date: 2019-07-19
Online publication date: 2020-01-13
Corresponding author
Panagiotis A. Eliopoulos   

Department of Agriculture & Agrotechnology, Gaiopolis, University of Thessaly, Larissa, Greece
Journal of Plant Protection Research 2019;59(4):544-551
Biological parameters of the larval parasitoid Cephalonomia tarsalis (Ashmead) (Hymenoptera : Bethylidae) and its host the saw-toothed beetle Oryzapehilus surinamensis (L.) (Coleoptera : Silvanidae) were studied in the laboratory. The duration of the immature period, survival during development, as well as adult longevity and the number of progeny of both insects were recorded. Our data were used for the estimation of several demographic parameters and life table construction of both the host and the parasitoid. The wasp managed to complete its development (egg – adult) in 19.8 days at 25°C, whereas the adult female lived for 24.3 days. The host O. surinamensis demonstrated a longer developmental period (30.5 days) and adult female longevity (103.0 days). Female wasps laid an average of 66.4 eggs throughout their lifetime whereas their beetle hosts laid five times more eggs (313.9). Life table parameters of C. tarsalis were estimated for the first time. The intrinsic rate of natural increase (rm) was 0.124 which was almost double that of its host (0.056). Our results are discussed on the basis of evaluating and improving the performance of C. tarsalis as a biocontrol agent against O. surinamensis in storage facilities.
The present study is a part of the research project “Development of modern and novel methods of Integrated Pest Management against stored products pests” and has been co-financed by the European Union (European Social Fund − ESF) and Greek national funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) − Research Funding Program: ARCHIMEDES III ARCHIMEDES III (Grant Number MIS 383555). Investing in knowledge society through the European Social Fund. The funding source had no involvement in study design, collection, analysis and interpretation of data.
The authors have declared that no conflict of interests exist.
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