Biological studies ofBrachyserphus abruptus [Hym.: Proctotrupidae], a nitidulid parasite |
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Authors: | R N Williams D S Fickle J R Galford |
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Institution: | (1) Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, 44691 Wooster, Ohio, USA;(2) Northeastern Forest Experiment Station's Timber and Watershed Laboratory Parsons, 26287, West Virginia, USA |
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Abstract: | Data are presented on survival, fecundity, and hosts ofBrachyserphus abruptus (Say), a solitary internal parasite of nitidulid (sap beetle) larvae. In the laboratory these wasps have been successfully
reared fromCarpophilus hemipterus (L.),C. freemani Dobson,C. lugubris Murray,Stelidota geminata (Say),S. octomaculata (Say),S. ferruginea Reitter,Glischrochilus quadrisignatus (Say),Lobiopa insularis (Castelnau), andHaptoncus luteolus (Erichson). Field collections ofB. abruptus have been made fromS. geminata, S. octomaculata, C. hemipterus, C. lugubris, L. insularis andH. luteolus. Oviposition continues throughout most of the adult female's lifetime. Under laboratory conditions life expectancy of females
wasca. 6 days. Mean number of progeny reaching adulthood per female was 57, with a 1∶1 sex ratio. First and 2nd instar nitidulids were suitable for successful development ofB. abruptus. Third instars were attacked byB. abruptus but were not successfully parasitized. Parasite development required 29 days in 1st instar hosts and 27 d. in 2nd instars. Percent parasitism in 1st instarC. hemipterus averaged 65% and for 2nd instar 45%. After parasitism, larvae ofC. hemipterus surviving to become adults averaged 0.6% for 1st instar, 9.3% for 2nd instar, and 90% for 3rd instar.
This article reports the results of research only. Mention of a proprietary product does not constitute an endorsement or
a recommendation for its use by The Ohio State University. |
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Keywords: | Brachyserphus abruptus parasite Nitidulidae biology behavior |
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