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Supercooling points and diapause termination in overwintering adults of orchard bees Osmia cornuta and O. rufa (Hymenoptera: Megachilidae)

Published online by Cambridge University Press:  09 March 2007

M.D. Krunić  and
L.Ž. Stanisavljević
M.D. Krunić
Affiliation:
Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia and Montenegro
L.Ž. Stanisavljević*
Affiliation:
Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia and Montenegro
*
*Fax: +381 112638 500 E-mail: Ljstanis@bf.bio.bg.ac.yu
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Abstract

The orchard bee species Osmia cornuta (Latreille) and O. rufa (Linnaeus) are both European in distribution. Osmia cornuta is distributed in the central and southern half of the continent, while O. rufa is distributed additionally in more northern parts of Europe, including Great Britain. These bees over-winter in cocoons as diapausing adults. The freezing temperatures of overwintering adults of O. cornuta and O. rufa during diapause are similar: −30°C to −24°C and −31°C to −26°C, respectively. However, there are differences in the termination of their diapause. Under natural conditions in the wider area of Belgrade, O. rufa appears in spring about two weeks later than O. cornuta.

Keywords

diapausesupercoolingOsmia
Type
Short Communication
Information
Bulletin of Entomological Research , Volume 96 , Issue 3 , June 2006 , pp. 323 - 326
Copyright
Copyright © Cambridge University Press 2006

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