Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-25T18:24:17.541Z Has data issue: false hasContentIssue false
  • English
  • Français

Control of summer and winter diapause in Pidorus euchromioides (Lepidoptera: Zygaenidae) on Chinese sweetleaf Symplocos chinensis

Published online by Cambridge University Press:  10 July 2009

Xue Fangsen  and
H. G. Kallenborn
Xue Fangsen
Affiliation:
Department of Plant Protection, Jiangxi Agricultural University, Nanchang, Jianxi 330045, People's Republic of China:
H. G. Kallenborn*
Affiliation:
Fachrichtung Zoologie, Universität des Saarlandes, Postfach 151150, D-66041, Saarbrücken, Germany
*
* Fax: 681 302 4610 E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Pidorus euchromioides Walker has two separate diapauses during its life cycle, a winter diapause as a fourth larval instar and a summer diapause as a prepupa in a cocoon. Winter diapause was induced by short photoperiods. The critical day length of 13 h 20 min to 13 h 40 min at 23.3°C under insectary conditions was very similar to the critical day length (13 h 32 min) observed in the field. Sensitivity to day length was restricted to the first 9 days, corresponding to the first and second instars. The duration of larval diapause was not only strongly correlated with the inducing photoperiod, but also dependent on the number of short days experienced during the larval growth period. The shortest diapause occurred at the critical day length, or when the larvae were exposed for 6 days (a critical number of short days) to a photoperiod of LD 12 h:12 h. The summer diapause appeared to be primarily determined by a genetic factor and only occurred in part of the overwintering generation and the first generation. The two different diapause mechanisms play important roles. Winter diapause ensures that P. euchromioides synchronizes its development and activity with the phenology of specific host plants, and summer diapause provides the species with a high degree of adaptation to an unpredictable environment.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 88 , Issue 2 , April 1998 , pp. 207 - 211
Copyright
Copyright © Cambridge University Press 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Beck, S.D. (1968) Insect photoperiodism. 288 pp. New York, Academic Press.Google Scholar
Müller, H.J. (1965) Das Problem der Insektendiapause. Verhandlungen der Deutschen Zoololgischen Gesellschaft, Jena, 192–222.Google Scholar
Müller, H.J. (1970) Formen der Dormanz bei Insekten. Nova Acta Leopoldina 35, 7–27.Google Scholar
Obrycki, J.J., Tauber, C.A. & Gollands, B. (1983) Environmental control of the season life cycle of Adalia bipunctata (Coleoptera: Coccinellidae). Environmental Entomology 12, 416–421.CrossRefGoogle Scholar
Pener, M.P. & Orshan, L. (1980) Reversible reproductive diapause and intermediate states between diapause and full reproductive activity in male Oedipoda miniata grasshoppers. Physiological Entomology 5, 417–426.CrossRefGoogle Scholar
Shen, R. & Xue, F. (1991) Biology of Pidorus euchromioides Walker. Entomological Knowledge 28, 29–31(in Chinese).Google Scholar
Tauber, M.J. & Tauber, C.A. (1974) Thermal accumulations, diapause, and oviposition in a conifer inhabiting predator, Chrysopa harrisii (Neuroptera). Canadian Entomologist 106, 969–978.CrossRefGoogle Scholar
Ushatinskaya, R.S. (1973) Insect diapause and its modifications. Obscaja biologija, Moskow 34, 195–215(in Russian).Google Scholar
Vinogradova, E.B. (1974) The pattern of reactivation of diapausing larvae in the blowfly, Calliphora vicina. Journal of Insect Physiology 20, 2487–2496.CrossRefGoogle ScholarPubMed
Waldbauer, G.P. (1978) Phenological adaptation and the polymodal emergence patterns of insects. pp. 127–144 in Dingle, H. (Ed.) Evolution of insect migration and diapause. New York, Heidelberg, Berlin, Springer.CrossRefGoogle Scholar
Wise, E.J. (1980) Seasonality distribution and life histories of Ephemeroptera in a Northumbrian river. Freshwater Biology 10, 101–111.CrossRefGoogle Scholar