Advertisement

Entomophaga

, Volume 21, Issue 2, pp 131–139 | Cite as

Adult diapause ofCybocephalus nigriceps nigriceps [Col.: Cybocephalidae]

  • D. Blumberg
Article

Abstract

During autumn and winter (October–February)Cybocephalus nigriceps nigriceps (J. Sahlberg) adults undergo a facultative diapause. The diapausing adults agregate in hiding places, development of the ovaries is arrested, and prey consumption is lowered. Diapause can be prevented by exposure to a long-day photoperiod (16 hr light) at high temperatures (29° and 32°C). Diapause is induced mainly by short-day conditions, but the termination of diapause is affected by both photoperiod (long-day conditions) and temperature (29°, 32° and 34°C). In mature females, diapause induction causes ovarian degeneration. The induction or inhibition of adult diapause is affected by photoperiods occurring during larval development as well as during adult life.

Keywords

Plant Pathology Larval Development Adult Life Mature Female Prey Consumption 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

Au cours de l'automne et de l'hiver (octobre-février), les adultes deCybocephalus nigriceps nigriceps (J. Sahlberg) subissent une diapause facultative. Les insectes se rassemblent dans des cachettes, le développement des ovaires s'arrête et la prédation diminue. La diapause peut être empêchée par une photopériode longue (16 h de lumière) et des températures élevées (29° et 32°C). Elle est provoquée principalement par les courtes photopériodes mais la fin de la diapause est conditionnée à la fois par la photopériode (jours longs) et la température (29°, 32° et 34°C). Chez les femelles mûres, l 'induction de la diapause cause la dégénérescence des ovaires. L'induction ou l'inhibition de la diapause imaginale est sous la dépendance des photopériodes pendant la vie larvaire aussi bien que pendant la vie imaginale.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Beck, S. D. — 1968. Insect Photoperiodism. —Academic Press, New York.Google Scholar
  2. Blumberg, D. — 1973. Field studies ofCybocephalus nigriceps nigriceps (J. Sahlberg) [Coleoptera: Cybocephalidae] in Israel. —J. Nat. Hist., 7, 567–571.Google Scholar
  3. De Wilde, J., Duinter, C. S. &Mook, L. — 1959. Physiology of diapause in the adult Colorado beetle (Leptinotarsa decemlineata Say). I. The photoperiod as a controlling factor. —J. Insect Physiol., 3, 75–85.CrossRefGoogle Scholar
  4. Hagen, K. S. — 1962. Biology and ecology of predaceousCoccinellidae. —Annu. Rev. Entomol., 7, 289–326.CrossRefGoogle Scholar
  5. Hans, H. — 1961. Termination of diapause and continious laboratory rearing of the sweet clover weevil,Sitona cylindricollis Fahr. —Entomol. Exp. Appl., 4, 41–46.Google Scholar
  6. Hodek, I. — 1960. Hibernation-bionomics inCoccinellidae. —Acta Soc. Entomol. Cechoslov., 57, 1–20.Google Scholar
  7. Hodek, I. &Cerkasov, J. — 1958. A study of the imaginal hibernation ofSemiadalia undecimnotata Schneid in the open. —Acta Soc. Zool. Bohem., 22, 180–192.Google Scholar
  8. Hodek, I. &Cerkasov, J. — 1960. Prevention and artificial induction of the imaginal diapause inCoccinella 7-punctata L. —Nature, 187, 345.PubMedGoogle Scholar
  9. Hodek, I. &Cerkasov, J. — 1961. Prevention and artificial induction of imaginal diapause inCoccinella septempunctata L. [Col. Coccinellidae]. —Entomol. Exp. Appl., 4, 179–190.CrossRefGoogle Scholar
  10. Kehat, M., Swirski, E., Blumberg, D. &Greenberg, S. — 1974. Integrated control of date palm pests in Israel. —Phytoparasitica, 2, 141–149.Google Scholar
  11. Schlottman, L. L. &Bonhag, P. F. — 1956. Histology of the ovary of the adult mealwormTenebrio molitor L. [Coleoptera: Tenebrionidae]. —Univ. Calif. Publ. Entomol., 11, 350–393.Google Scholar
  12. Smirnoff, W. — 1954. LesCybocephalus [Col. Cybocephalidae] d'Afrique du Nord, prédateurs deParlatoria blanchardi Targ. [Homoptera, Coccoidea] parasite du palmier-dattier. —Rev. Path. Veg. Entomol. Agric. Fr., 33, 84–101.Google Scholar
  13. Smirnoff, W. — 1957. La cochenille du palmier-dattier (Parlatoria blanchardi Targ.) en Afrique du Nord, comportement, importance économique, prédateurs et lutte biologique. —Entomophaga, 2, 1–98.CrossRefGoogle Scholar
  14. Storch, R. H. — 1973. The effect of photoperiod onCoccinella transversoguttata [Coleontera: Coccimellidae]. —Entomol. Exp. Appl., 16, 77–82.CrossRefGoogle Scholar

Copyright information

© Le François 1976

Authors and Affiliations

  • D. Blumberg
    • 1
  1. 1.Division of EntomologyThe Volcani Center, A.R.O.Bet DaganIsrael

Personalised recommendations