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Control of hatching time of eggs of Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae)

Published online by Cambridge University Press:  10 July 2009

R. F. Chapman ,
E. A. Bernays ,
S. Woodhead ,
D. E. Padgham  and
S. J. Simpson
R. F. Chapman
Affiliation:
Tropical Development and Research Institute, College House, Wrights Lane, London, W8 5SJ UK
E. A. Bernays
Affiliation:
Tropical Development and Research Institute, College House, Wrights Lane, London, W8 5SJ UK
S. Woodhead
Affiliation:
Tropical Development and Research Institute, College House, Wrights Lane, London, W8 5SJ UK
D. E. Padgham
Affiliation:
Tropical Development and Research Institute, College House, Wrights Lane, London, W8 5SJ UK
S. J. Simpson
Affiliation:
Tropical Development and Research Institute, College House, Wrights Lane, London, W8 5SJ UK
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Abstract

In the field in India, most eggs of Chilo partellus (Swinh.) hatched in the morning soon after first light. Laboratory experiments show that in continuous light hatching occurs after 250 hour-degrees of development above 12°C from the time at which the head capsule darkens (blackheading). Hatching may be advanced by a lights-on stimulus or retarded by darkness, and these effects account for the extensive hatching at dawn. Hatching is not entrained by a circadian rhythm. The significance of hatching at this time of day is discussed.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 73 , Issue 4 , December 1983 , pp. 667 - 677
Copyright
Copyright © Cambridge University Press 1983

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References

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