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Hatching pattern and survival of first instars of Ectropis excursaria (Guenee) (Geometridae: Lepidoptera)

Published online by Cambridge University Press:  19 September 2011

R. Ramachandran
R. Ramachandran
Affiliation:
Waite Agricultural Research Institute, Glen Osmond, South Australia 5064
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Abstract

In field conditions in South Australia hatching of eggs of Ectropis excursaria showed a morning and an afternoon peak. In the laboratory, hatching coincided with “lights-on” stimulus at 20°C, 10:14 and 12:12 L:D. Increase or decrease of temperature by 5°C shifted the start of hatching to late scotophase while increasing photoperiod shifted a substantial proportion of hatching to later in photophase. Survival of first instars was linearly related to saturation-deficit of the atmosphere.

Résumé

L'eclosion des oeufs de l'Ectropis excursaria sous des conditions naturelles sur le terrain au sud de l'australie a donne des pics dans Ia matinée et l'aprésmidi. Au laboratoire l'eclosion coincidait avec la presence de la lumiere a 20°C, 10:14 et 12:12 LD (lumière et sans lumière). La croissance ou decroissance de la temperature de 5°C a changé le debut de l'eclosion jusqu'a la derniere phase du processus. La photoperiode croissant a changé une proportion substantielle de l'eclosion des oeufs. La survie des larves du premier stage etait relativement reliée à la saturation et deficit de l'atmosphere.

Keywords

Ectropis excursariaphotoperiodthermoperiodfirst instarssurvivalsaturation-deficitEctropis excursariaphotoperiodethermoperiodepremier stage larvairesurviesaturationdeficit
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 10 , Issue 4 , August 1989 , pp. 507 - 511
Copyright
Copyright © ICIPE 1989

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References

REFERENCES

Beck, S.D. (1983) Insect thermoperiodism. A. Rev. Entomol. 28, 91–108.CrossRefGoogle Scholar
Chapman, R.F., Bemays, E.A., Woodhead, S., Padgham, D.E. and Simpson, S.J. (1983) Control of hatching time of eggs of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae). Bull. entomol. Res. 73, 667–677.CrossRefGoogle Scholar
Raina, A.K. (1982) Daily rhythms in the sorghum shootfly, Atherigona soccata: Oviposition, egg-hatch and adults eclosion. Physiol. Entomol. 7, 65–70.CrossRefGoogle Scholar
Ramachandran, R. (1986) Behaviour of the first instar Ectropis excursaria (Lepidoptera: Geometridae) in relation to host-finding process. Ph.D thesis, University of Adelaide.Google Scholar
Ramachandran, R. (1987) Influence of host plants on the wind dispersal and the survival of an Australian geometrid caterpillar. Entomol. exp. Appl. 44, 289–294.CrossRefGoogle Scholar
Ramachandran, R. (1988) Experiments on the responses of the larval stages of the geometrid moth Ectropis excursaria to light and gravity. Entomol. exp. Appl. 46, 133–140.CrossRefGoogle Scholar
Saunders, D.S. (1976) Insect Clocks. Pergamon Press, Oxford.Google Scholar