Abstract
We conducted three bioassays to evaluate the effect of low-temperature storage of eggs (host) and pupae and adults (parasitoid) on the biology and parasitism capacity of the egg parasitoid Telenomus remus (Nixon) (Hymenoptera: Platygastridae). Viable stored Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) eggs were parasitized to the same degree or even higher than fresh eggs when stored until 14 days at 5°C or until 21 days at 10°C. In contrast, the percentage of parasitized sterilized eggs was equal to the control only when stored for 7 and 14 days. Survival of T. remus pupae declined with storage time at both studied temperatures (5 and 10°C). However, after 7 days of storage, survival of pupae was still 86.3 and 64.9% at 10 and 5°C, respectively. The number of adult male survivors remained similar until the fourth storage day at both 5 and 10°C. In contrast, female survival did not differ until day 8 at 10°C or day 6 at 5°C. Parasitism capacity of stored adults was not altered by storage compared with the control. Therefore, we conclude that the maximal storage time at 10°C is 21 days for viable C. cephalonica eggs and 7 days for T. remus pupae, while parasitoid adults should not be stored for more than 4 days at either 5 or 10°C.
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Acknowledgments
The authors would like to thank Embrapa Soja, the “Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)”, and the “Conselho Nacional de Desenvolvimento Científico e Tecnológico” (CNPq), grant number 303779/2015-2, for funds that supported this research. Thanks are also extended to Dagmar Frisch for the English revision of this manuscript. This paper was approved for publication by the Editorial Board of Embrapa Soja.
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Edited by Tiago C da Costa Lima — Embrapa
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Queiroz, A.P., Bueno, A.F., POMARI-FERNANDES, A. et al. Low Temperature Storage of Telenomus remus (Nixon) (Hymenoptera: Platygastridae) and its Factitious Host Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae). Neotrop Entomol 46, 182–192 (2017). https://doi.org/10.1007/s13744-016-0442-6
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DOI: https://doi.org/10.1007/s13744-016-0442-6