Eur. J. Entomol. 102 (3): 453-457, 2005 | DOI: 10.14411/eje.2005.065

Summer diapause and winter quiescence of Hippodamia (Semiadalia) undecimnotata (Coleoptera: Coccinellidae) in central Greece

Panayotis KATSOYANNOS1, Dimitris C. KONTODIMAS*,2, George STATHAS3
1 National Agricultural Research Foundation, 19 Eghialias & Halepa, 151 25 Marousi, Greece
2 Benaki Phytopathological Institute, 8 St. Delta, 145 61 Kifissia, Greece
3 Technological Educational Institute of Kalamata, Dept. of Crop Production, 24 100 Antikalamos, Greece

The aestivo-hibernation in central Greece of the aphidophagous ladybeetle Hippodamia (Semiadalia) undecimnotata (Schneider) (Coleoptera: Coccinellidae) was studied. H. undecimnotata is a multivoltine species in Greece. In the lowlands, all instars are abundant in spring, becoming scarce from July until the end of October and they are absent in winter. In June, most H. undecimnotata adults migrate to mountainous aestivo-hibernation sites. The duration of pre-oviposition period in females sampled monthly from the summits of the mountains Chlomo and Kitheron in central Greece and transferred to laboratory conditions of high temperature (25°C), long day (16L : 8D), and abundance of aphids (Aphis fabae), indicated that the H. undecimnotata females were in diapause during July and August. The diapause gradually terminated from late August to late October and was followed by a period of quiescence extending from November to March of the following year. During the summer diapause, arrested ovarian development was indicated by the undifferentiated state of the ovaries in all females. Males and females had enlarged fat bodies, and the median preoviposition period after the transfer to the laboratory was 92 days in early July and 64 days in early August. During the winter quiescence, arrested ovarian development was characterized by immature ovaries in females and, in some samples, by vitellogenic resorption in a few females. In winter, adults contained varying amounts of fat body reserves, and the median preoviposition period of females transferred to breeding conditions was 30 days in early November and 16 days in mid January.

Keywords: Coccinellidae, Hippodamia (Semiadalia) undecimnotata, diapause, quiescence, aestivo-hibernation

Received: September 9, 2004; Revised: June 6, 2005; Accepted: June 6, 2005; Published: August 15, 2005  Show citation

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KATSOYANNOS, P., KONTODIMAS, D.C., & STATHAS, G. (2005). Summer diapause and winter quiescence of Hippodamia (Semiadalia) undecimnotata (Coleoptera: Coccinellidae) in central Greece. EJE, 102(3), 453-457. doi: 10.14411/eje.2005.065
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