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Studies on the maize stem borer, Busseola fusca (Lepidoptera: Noctuidae) and its major parasitoid, Dolichogenidea fuscivora (Hymenoptera: Braconidae), in eastern Ethiopia

Published online by Cambridge University Press:  10 July 2009

K. Yitaferu  and
A. K. Walker
K. Yitaferu
Affiliation:
Alemaya University of AgriculturePO Box 138, Dire Dawa, Ethiopia
A. K. Walker
Affiliation:
International Institute of Entomology, 56 Queen's Gate, Cromwell Road, London, SW5 5JR, UK
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Abstract

Studies on the lepidopterous stem borer, Busseola fusca (Fuller) and its major larval parasitoid, Dolichogenidea fuscivora Walker were carried out in the field and the laboratory in eastern Ethiopia. Larvae of B. fusca are also parasitized in the field by the braconid, Bracon sesamiae Cameron and the sarcophagid, Sarcophaga sp., but in low numbers. Parasitism of B. fusca by D. fuscivora is as high as 71% during the dry season (November-March) and approximately 18% in the wet season (June-September). Dolichogenidea fuscivora is active throughout the year. In the laboratory it requires nearly 26 days at 24 ± 1°C to complete the development of one generation (egg to egg laying). Longevity of adults is affected by the availability of food and water. Mating and oviposition reduced the life spans of males and females, respectively. Sixty five to 75 larvae emerged from eggs laid by a single female. The sex ratio ranged from 1:1 to 7:1 (female:male), the average being 5:1.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 87 , Issue 3 , June 1997 , pp. 319 - 324
Copyright
Copyright © Cambridge University Press 1997

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