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Studies on the biology of Acanthomia tomentosicollis (Stål) (Hemiptera: Coreidae) in the field and insectary

Published online by Cambridge University Press:  10 July 2009

R. I. Egwuatu  and
T. Ajibola Taylor
R. I. Egwuatu
Affiliation:
Entomology Unit, Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria.
T. Ajibola Taylor
Affiliation:
Entomology Unit, Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria.
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Abstract

Studies on the biology of Acanthomia tomentosicollis (Stål) at Ibadan, Nigeria, showed that the periods of development in the field and the insectary averaged 17 and 18 days, respectively. The hemispherical, hexagonally sculptured eggs were laid in batches of 2.99 (mean=7 eggs per batch in the insectary and 20 in the field). Preoviposition periods were 11–22 days in unmated and 6–9 days in mated females. The mean number of eggs deposited by mated females (202) was significantly higher than that deposited by unmated females (135), although the average oviposition period of 16 weeks in unmated females was three weeks longer than in mated females. Unmated males and females were longer-lived than their mated counterparts, and females generally lived longer than males. These results and other observations on 'the biology of A. tomentosicollis are discussed in the context of its seasonal biology and the pattern of infestation of pigeon pea (Cajanus cajari), its main host plant.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 67 , Issue 2 , June 1977 , pp. 249 - 257
Copyright
Copyright © Cambridge University Press 1977

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