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Management of Cereal Stem Borers, Especially Chilo Partellus, Using Microsporidia

Published online by Cambridge University Press:  19 September 2011

M. O. Odindo
M. O. Odindo
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30, Mbita, South Nyanza, Kenya
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Abstract

Lepidopteran stem borers account for heavy losses in cereals in areas where they are prevalent throughout Africa. Microsporidia, especially Nosema sp. may be developed for use in the management of this group of insect pests. Studies carried out so far show that the application of Nosema spores may increase yield up to 34% in sorghum when the plants are infested with Chilo partellus eggs and sprayed with the pathogen, and up to 80% in sorghum infested with borer larvae.

The procedure for spore production is simple, and may easily be adapted for small scale industrial production by local or regional communities and organizations. In trials aimed at the mass production of Nosema sp. for the management of C. partellus, a yield of 109 spores/larva has been attained. If this production level can be maintained, then a system that produces only 6000 larvae/day would yield enough cadavers for preparation of 6000 1 daily. At the rate in which the pathogen suspension is applied as foliar sprays in the field, this would be sufficient to treat 5373 ha. If widely adopted, use of microsporidia would revolutionize cereal stem borer management in the tropics.

Résumé

Les Lépidoptères foreurs de tiges sont responsables des pertes énormes dans la production de mais, sorgho, tef, millet et d'autres céréales dans les régions où ils sont prédominants a travers l'Afrique. Les Microsporidies, particulierement Nosema sp. peuvent être développées pour la lutte contre les foreurs de tiges. Les études conduites jusqu' à ce jour montrent que l'application des spores de Nosema peut augmenter la production de sorgho jusqu' à 34%, lorsque les plantes sont infestées avec les pontes de Chilo partellus puis traitees avec le pathogène. L'augmentation de la production est de l'ordre de 80% dans le cas où les plantes sont infestées avec les larves.

Le procédé de production des spores est simple, et peut être facilement adapté pour les petites entreprises par les communautés et organisations régionales. Dans la présente étude, une production de 109 spores/larve a été obtenue. Dans le cas où ce niveau de production peut être maintenu, alors un procédé susceptible de ne produire que 6000 larves par jour, produirait suffisamment de cadavres pour la préparation de 6000I par jour. A la concentration à laquelle le pathogène est pulverisé sur le substrat foliaire au champ, il serait possible de traiter 5373 ha. Dans le cas où le concept de lutte biologique est largement adopté, l'emploi des microsporidies pourrait révolutionner la lutte contre les foreurs de tiges.

Keywords

Managementcereal stem borersChilo partellusmicrosporidiaNosema sp. productionformulation
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 12 , Issue 1-2-3: Current Topics in Tropical Entomology , June 1991 , pp. 51 - 55
Copyright
Copyright © ICIPE 1991

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References

REFERENCES

Ampofo, J. K. O. (1986) Maize stalk borer (Lepidoptera: Pyralidae) damage and plant resistance. Environ. Entomol. 15, 1124–1129.CrossRefGoogle Scholar
Andreadis, T. G. (1984) Epizootiology of Nosema pyrausta in field population of the European corn borer (Lepidoptera: Pyralidae). Environ. Entomol. 13, 882–887.CrossRefGoogle Scholar
Angus, T. A. and Luthy, P. (1971) Formulation of microbial insecticides. In Microbial Control of Insects and Mites (Edited by Burges, H. D. and Hussey, N. W.), pp. 623–628. Academic Press, New York, London.Google Scholar
Couch, T. L. and Ignoffo, C. M. (1981) Formulation of insect pathogens. In Microbial Control of Pests and Plant Diseases 1970–1980 (Edited by Burges, H. D.), pp. 621–634. Academic Press, New York, London.Google Scholar
Hill, R. E. and Gary, W. F. (1979) Effects of the microsporidium Nosema pyrausta on field populations of European corn borers in Nebraska. Environ. Entomol. 8, 91–95.CrossRefGoogle Scholar
Hostounsky, Z. and Weiser, J. (1972) Production of spores of Nosema plodiae Kellen et Lindegren in Mamestra brassicae L. after different infective dosage. Vest. Cs. Spol. Zool. 36, 97–100.Google Scholar
Lewis, L. C. (1982) Persistence of Nosema pyrausta and Vairimorpha necatrix measured by microsporidiosis in the European corn borer. J. econ. Entomol. 75, 670–674,CrossRefGoogle Scholar
Lewis, L. C. and Cossentine, J. E. (1986) Season long intraplant epizootics of entomo-pathogens Beauveria bassiana and Nosema pyrausta in a corn agroecosystem. Entomophaga 31, 363–369.CrossRefGoogle Scholar
Lewis, L. C. and Lynch, R. E. (1978) Foliar application of Nosema pyrausta for suppression of populations of European corn borer. Entomophaga 23, 83–88.CrossRefGoogle Scholar
Richter, A. R. and Fuxa, J. R. (1984) Timing, formulation and persistence of a nuclear polyhedrosis virus and a microsporidian for control of the velvetbean caterpillar (Lepidoptera: Noctuidae) in soybean. J. econ. Entomol. 77, 1299–1306.CrossRefGoogle Scholar
Sampson, M. A. and Kumar, R. (1983) Population dynamics of the stem borer complex on sugar-cane in southern Ghana. Insect Sci. Applic. 4, 25–32.Google Scholar
Ochieng, R. S., Onyango, F. O. and Bungu, M. D. O. (1985) Improvement of techniques for mass-culture of Chilo partellus (Swinhoe). Insect Sci. Applic. 6, 425–428.Google Scholar
Seshu Reddy, K. V. (1983) Studies on the stem-borer complex of sorghum in Kenya. Insect Sci. Applic. 4, 3–10.Google Scholar
Seshu Reddy, K. V. (1988) Assessment of on-farm yield losses in sorghum due to insect pests. Insect Sci. Applic. 9, 679–685.Google Scholar
Smith, D. B., Hostetter, D. L. and Ignoffo, C. M. (1978) Formulation of a viral (Baculovirus heliothis) insecticide. J. econ. Entomol. 71, 814–817.CrossRefGoogle Scholar
Unnithan, G. C. (1987) Development and reproductive biology of the maize stem-borer Busseola fusca Fuller (Lepid.: Noctuidae). J. Applic. Entomol. 104, 172–179.CrossRefGoogle Scholar
Wilson, G. G. (1981) Nosema fumiferanae, a natural pathogen of a forest pest: Potential for pest control. In Microbial Control of Pests and Plant Diseases 1970–1980 (Edited by Burges, H. D.), pp. 595–601. Academic Press, London, New York.Google Scholar