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Status of Eldana saccharina (Lepidoptera: Pyralidae), its host plants and natural enemies in Ethiopia

Published online by Cambridge University Press:  09 March 2007

Y. Assefa ,
D.E. Conlong  and
A. Mitchell
Y. Assefa
Affiliation:
School of Biological and Conservation Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa
D.E. Conlong*
Affiliation:
School of Biological and Conservation Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa South African Sugarcane Research Institute, Private Bag X02, Mount Edgecombe 4300, South Africa
A. Mitchell
Affiliation:
Agricultural Scientific Collections Unit, Orange Agricultural Institute, New South Wales Department of Primary Industries, Forest Road, Orange, NSW 2800, Australia
*
*Fax: +27 (0)31 5087597 E-mail: Des.Conlong@sugar.org.za
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Abstract

Surveys for sugarcane stem borers were undertaken in Ethiopia to determine the prevalence and distribution of these and their natural enemies in crops and indigenous host plants. Eldana saccharina Walker was not recovered from sugarcane, but was present in three indigenous wetland sedges, Cyperus papyrus, C. fastigiatus and C. dives in the southern, central and northern part of the country. The latter indigenous host plant was present in waterways adjacent to sugarcane on the commercial sugar estates. The tachinids Schembria eldanae Barraclough and Actia sp. were common parasitoids of E. saccharina larvae in these indigenous sedges. The braconid Dolichogenidea sp. was recovered from E. saccharina larvae in C. dives. Pathogens comprising Beauveria bassiana, Bacillus thuringiensis and Entomophthora sp., were found to be important mortality factors of E. saccharina larvae in the indigenous sedges. The occurrence of E. saccharina in Ethiopia is reported for the first time, and the host plant preferences of the borer and its indigenous natural enemies found during the surveys are recorded. In addition, its potential threat to sugarcane production in Ethiopia is discussed.

Keywords

Eldana saccharinaEthiopiaparasitoidnatural enemiessedgessugarcanewetlands
Type
Research Article
Information
Bulletin of Entomological Research , Volume 96 , Issue 5 , October 2006 , pp. 497 - 504
Copyright
Copyright © Cambridge University Press 2006

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