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Reproductive phenology of Listronotus bonariensis (Kuschel) (Coleoptera:Curculionidae) in northern New Zealand pastures

Published online by Cambridge University Press:  10 July 2009

G. M. Barker ,
R. A. Prestidge  and
R. P. Pottinger
G. M. Barker
Affiliation:
Ruakura Agriculture Centre, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, NZ
R. A. Prestidge
Affiliation:
Ruakura Agriculture Centre, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, NZ
R. P. Pottinger
Affiliation:
Ruakura Agriculture Centre, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, NZ
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Abstract

The reproductive phenology of Listronotus bonariensis (Kuschel) in the north of North Island, New Zealand, was studied by dissection of adults collected at intervals from several sites. First-generation adults exhibited reproductive development and activity, followed by gonad atrophication and death. Most second-generation adults entered directly into oligopause in the autumn. Some early emergent weevils of this generation oviposited before onset of winter and reproductive dormancy. Oligopause was not intense, and reproductive maturity was gradually attained over the winter, with resumption of egg laying in early spring. These results are discussed in relation to population reproductive biology and survival.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 78 , Issue 4 , December 1988 , pp. 659 - 668
Copyright
Copyright © Cambridge University Press 1988

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