caa a22 4500 606161724 CHVBK 20210128100636.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10526-015-9661-8 doi (NATIONALLICENCE)springer-10.1007/s10526-015-9661-8 Preference and life history traits of Aphelinus abdominalis (Hymenoptera: Aphelinidae) when offered different development stages of the lettuce aphid Nasonovia ribisnigri (Hemiptera: Aphididae) [Elektronische Daten] [Govinda Shrestha, Henrik Skovgård, Tove Steenberg, Annie Enkegaard] The degree of parasitisation, host feeding, developmental time, adult emergence and female sex ratio of the parasitoid Aphelinus abdominalis were evaluated when different host stages of N. ribisnigri (1st, 2nd, 3rd, alatoid 4th instar or newly moulted apterous adult) were offered as hosts under no-choice conditions in the laboratory at 22°C, 70% RH and 16:8 L:D. In addition, the parasitoid preference between 2nd and alatoid 4th instar was examined. In the no-choice experiments, the highest degree of successful parasitisation (leading to mummy formation) (41-56%) was observed when young and intermediate stages of the lettuce aphid were exposed for parasitism compared with older developmental stages. This pattern was supported in the choice experiment where significantly more 2nd instar lettuce aphids were parasitised than alatoid 4th instars, with Manly's preference index (mean±SE) for the former stage being 0.79±0.03. Incomplete parasitisation was recorded highest in 1st instar (mean±SE: 29.95%±4.71), with much lower values (1-8%) attained in the 2nd, 3rd, alatoid 4th instar and apterous adult with no significant differences. Host feeding was low (2-4%) and only recorded in 1st and 2nd instars. The mean development time of A. abdominalis from egg to adult emergence was longest for 1st instar (19.03±0.12days) and the shortest for apterous adults (16.59±0.29days). A high percentage of adult emergence (>80%) from mummified aphids as well as a strongly female-biased sex ratio (>78%) were found across all host stages of the lettuce aphid. International Organization for Biological Control (IOBC), 2015 Biocontrol nationallicence Host instar nationallicence Hymenoptera nationallicence Parasitoid nationallicence Host selection nationallicence Shrestha Govinda Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut Skovgård Henrik Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut Steenberg Tove Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut Enkegaard Annie Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut BioControl Springer Netherlands 60/4(2015-08-01), 463-471 1386-6141 60:4<463 2015 60 10526 https://doi.org/10.1007/s10526-015-9661-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10526-015-9661-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shrestha Govinda Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut NATIONALLICENCE 700 1- Skovgård Henrik Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut NATIONALLICENCE 700 1- Steenberg Tove Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut NATIONALLICENCE 700 1- Enkegaard Annie Department of Agroecology, Faculty of Science and Technology, Research Centre Flakkebjerg, Aarhus University, Forsøgsvej 1, 4200, Slagelse, Denmark aut NATIONALLICENCE 773 0- BioControl Springer Netherlands 60/4(2015-08-01), 463-471 1386-6141 60:4<463 2015 60 10526