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Ovigeny strategy of the parasitic wasp Cosmocomoidea annulicornis (Hymenoptera: Mymaridae): effect of female age, feeding and host availability on reproductive traits

Published online by Cambridge University Press:  06 September 2021

Carolina Manzano*
PROIMI-Biotecnología, CONICET, Av. Belgrano y Pje. Caseros (T4001MVB), Tucumán, Argentina
Eduardo G. Virla
PROIMI-Biotecnología, CONICET, Av. Belgrano y Pje. Caseros (T4001MVB), Tucumán, Argentina Instituto de Entomología, Fundación Miguel Lillo, Miguel Lillo 251 (4000), Tucumán, Argentina
Maria V. Coll Araoz
PROIMI-Biotecnología, CONICET, Av. Belgrano y Pje. Caseros (T4001MVB), Tucumán, Argentina
Erica Luft-Albarracin
PROIMI-Biotecnología, CONICET, Av. Belgrano y Pje. Caseros (T4001MVB), Tucumán, Argentina
Author for correspondence: Carolina Manzano, Email:


The reproductive traits of the mymarid wasp Cosmocomoidea annulicornis (Ogloblin) (Hymenoptera: Mymaridae) attacking eggs of the sharpshooter Tapajosa rubromarginata (Signoret) (Hemiptera: Cicadellidae) were evaluated under laboratory conditions. Bioassays were carried out to estimate the realized fecundity and egg load of females. The ovigeny index was calculated and different biological traits, such as body size, oöcyte length, gaster length and wing length, were analysed to assess significant associations between these traits and the species fitness. In addition, the effect of host availability and feeding on longevity and potential fecundity throughout life and the effect of female age on egg maturation dynamics were assessed. The results showed that C. annulicornis is a strongly synovigenic species. A positive correlation was found between fecundity and longevity of the females and between body size and oöcyte length. Contrary to expected, body size was not related to fecundity and longevity. Females lived significantly longer in the presence of hosts and honey than when they were host-deprived and honey-fed or both host and honey deprived. Host availability had a significant effect on the amount of eggs laid by C. annulicornis females. Female age was negatively associated with oöcyte length. Furthermore, females were able to mature additional eggs as they aged, nevertheless, when host-deprived, senescent females presented significantly less mature eggs than younger ones, suggesting a possible egg oosorption. These results might contribute to a better understanding of the reproductive potential of this species as a biocontrol agent.

Research Paper
Copyright © The Author(s), 2021. Published by Cambridge University Press

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