Optimizing container size and rearing density for rapid and economic mass rearing of Oenopia conglobata (Linnaeus, 1758) (Coleoptera: Coccinellidae)
Abstract
A study was conducted to determine the optimum container size and rearing density to economize and optimize the mass rearing of Oenopia conglobata (Linnaeus, 1758) (Coleoptera: Coccinellidae) during 2017 in Şanlıurfa, Turkey. The experiment consisted of three types of containers of varying size (106, 310 and 785 ml, regarded as small, medium and large, respectively) and four different rearing densities of O. conglobata (1, 5, 10 and 20 larvae/container, regarded as low, moderate, medium and high rearing density, respectively). Oenopia conglobata was fed with the eggs of Ephestia kuehniella Zeller, 1879 (Lepidoptera: Pyralidae) throughout the study. The highest (100%) larval survival rate was recorded for all containers with low rearing density, whereas the lowest (31.5-35.0%) larval survival was observed in medium containers with medium and high rearing density. Medium containers at low rearing density had the shortest larval development period (8.6 d), while the shortest pupal development period (4.3-4.4 d) was in medium and large containers at medium and moderate density, respectively. The highest rearing cost wascomputed for small and medium containers at low rearing density, whereas the lowest rearing cost was incurred with largecontainers at high rearing density. Considering the survival rates, development periods and economic cost incurred; large containers with high rearing density is recommended for the economic and rapid mass rearing of O. conglobata.
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References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Publication Date
December 1, 2019
Submission Date
May 10, 2019
Acceptance Date
July 22, 2019
Published in Issue
Year 2019 Volume: 43 Number: 4
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