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Oviposition by Diopsis macrophthalma Dalman (Diptera: Diopsidae) on different rice varieties and development of deadheart

Published online by Cambridge University Press:  10 July 2009

A. M. Alghali  and
E. O. Osisanta
A. M. Alghali
Affiliation:
International Institute of Tropical Agriculture, Ibadan, Nigeria
E. O. Osisanta
Affiliation:
Department of Agricultural Biology, University of Ibadan, Nigeria
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Abstract

Studies were carried out in Nigeria on oviposition and the deadhearts caused by Diopsis macrophthalma Dalm. on ten rice varieties. The varieties were divided into three groups according to the numbers of eggs recorded on them. Strong positive correlations existed between (a) the numbers of eggs and tillers, (b) the numbers of eggs and deadhearts, and (c) the numbers of deadhearts and tillers. Some varieties compensated for damage by the production of new tillers. In the variety Suakoko 8, most of the eggs were confined to the leaf blades in young plants and to the leaf sheaths as the plants grew older. Peak oviposition occurred 30–40 days after transplanting. Some implications of the results for a pest management programme are discussed.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 72 , Issue 4 , December 1982 , pp. 583 - 588
Copyright
Copyright © Cambridge University Press 1982

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References

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