Insect Science and its Application (2001) 21, 353-359

Emana Getu, W.A. Overholt and E. Kairu (2001)
Distribution and species composition of stemborers and their natural enemies in maize and sorghum in Ethiopia
Insect Science and its Application 21 (4), 353-359
Abstract: Surveys were conducted to determine the species composition of stemborers and their natural enemies in maize and sorghum in 1999 and 2000 in eastern, northern, southern and western Ethiopia. The six species of stemborers found attacking maize and sorghum were Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), Busseola fusca Fuller, Sesamia calamistis Hampson (Lepidoptera: Noctuidae), S. nonagrioides botanephaga Tams and Bowden (Lepidoptera: Noctuidae), Rhynchaenus niger (Horn) (Coleoptera: Rhynchophoridae) and Pissodes dubious (Ström) (Coleoptera: Rhynchophoridae). Twenty species of primary parasitoids of eggs, larvae and pupae of Ch. partellus, B. fusca and S. calamistis were recorded. Other natural enemies, including predators, fungi and nematodes, were also found. Cotesia flavipes Cameron (Hymenoptera: Braconidae) was the dominant and the most widely distributed parasitoid of stemborers in Ethiopia, and was reared from field-collected Ch. partellus, B. fusca and S. calamistis.

Des enquêtes ont été menées en 1999 et 2000 en Ethiopie afin de déterminer la composition des espèces de foreurs présents sur maïs et sorgho et leurs ennemis naturels. Les six espèces de foreurs trouvées sur le maïs et le sorgho sont Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), Busseola fusca Fuller, Sesamia calamistis Hampson (Lepidoptera: Noctuidae), S. nonagrioides botanephaga Tams and Bowden (Lepidoptera: Noctuidae), Rhynchaenus niger (Horn) (Coleoptera: Rhynchophoridae) et Pissodes dubious (Ström) (Coleoptera: Rhynchophoridae). Vingt espèces de parasitoïdes primaires des oeufs, des larves et des pupes de Ch. partellus, B. fusca et S. calamistis ont été répertoriés. D'autres ennemis naturels en l'occurrence des prédateurs, des champignons et des nématodes ont aussi été trouvés. Le plus abondant et le plus largement répartie des parasitoïdes des foreurs en Ethiopie a été Cotesia flavipes Cameron (Hymenoptera: Braconidae). Il a été collecté sur Ch. partellus, B. fusca et S. calamistis.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): William A. Overholt, Getu Degaga Emana

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Chilo partellus		Ethiopia
	Sesamia calamistis		Ethiopia
	Busseola fusca		Ethiopia
	Rhynchaenus niger		Ethiopia
Cotesia flavipes (parasitoid)	Chilo partellus		Ethiopia
Cotesia flavipes (parasitoid)	Sesamia calamistis		Ethiopia
Cotesia flavipes (parasitoid)	Busseola fusca		Ethiopia