NDLI: Preference and life history traits of Aphelinus abdominalis (Hymenoptera: Aphelinidae) when offered different development stages of the lettuce aphid Nasonovia ribisnigri (Hemiptera: Aphididae)

Content Provider	Springer Nature Link
Author	Shrestha, Govinda Skovgård, Henrik Steenberg, Tove Enkegaard, Annie
Copyright Year	2015
Abstract	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 ± 0.12 days) and the shortest for apterous adults (16.59 ± 0.29 days). 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.
Starting Page	463
Ending Page	471
Page Count	9
File Format	PDF
ISSN	13866141
Journal	BioControl
Volume Number	60
Issue Number	4
e-ISSN	15738248
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-02-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biocontrol Host instar Hymenoptera Parasitoid Host selection Entomology Plant Pathology Agriculture Animal Ecology Animal Biochemistry Behavioral Sciences
Content Type	Text
Resource Type	Article
Subject	Insect Science Agronomy and Crop Science

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