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The role of migration in the life system of the African armyworm Spodoptera exempta

Published online by Cambridge University Press:  19 September 2011

D. J. W. Rose
Affiliation:
DLCO-EA/TDRI/EEC Armyworm Project, P.O. Box 30023, Nairobi, Kenya
C. F. Dewhurst
Affiliation:
DLCO-EA/TDRI/EEC Armyworm Project, P.O. Box 30023, Nairobi, Kenya
W. W. Page
Affiliation:
DLCO-EA/TDRI/EEC Armyworm Project, P.O. Box 30023, Nairobi, Kenya
L. D. C. Fishpool
Affiliation:
DLCO-EA/TDRI/EEC Armyworm Project, P.O. Box 30023, Nairobi, Kenya
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Abstract

The African armyworm is a migrant moth which, in its larval form, can cause severe plagues which destroy cereal crops, sugarcane and pastures in many parts of Africa. This paper reviews the relevant aspects of a multidisciplinary study into the dispersal behaviour and re-concentration of moths, migratory flight, source areas, population upsurges and the seasonal movement of moths. It introduces the new concepts of primary and critical outbreaks.

Résumé

Le chénille léqionnaire c'est un phalène migrateur qui comme les larves en pêut manger tous nos cereales, nos cannes a sucre et aussi nos élévages en Afrique.

Ce document-ci examine les aspects pertinent d'un étude des routes divèrs pour étudier le dispersion et encore le concentration des phalènes, leurs vols d'émigration, places de naissance et leurs erruptions accroissement des populations et leurs mouvements saisonniers partout en Afrique.

Type
Symposium IV: Migration and Dispersal of Tropical Noctuid Moths
Copyright
Copyright © ICIPE 1987

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References

REFERENCES

Blair, B. W., Rose, D. J. W. and Law, A. B. (1980) Synoptic weather associated with outbreaks of African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) in Zimbabwe during 1973 and 1976–1977. Zimbabwe J. agric. Res. 18, 95110.Google Scholar
Brown, E. S., Betts, E. and Rainey, R. C. (1969) Seasonal changes in distribution of the African armyworm Spodoptera exempta (Wlk.) (Lep., Noctuidae) with special reference to Eastern Africa. Bull. ent. Res. 58, 661728.CrossRefGoogle Scholar
Brown, E. S. and Swaine, G. (1966) New evidence on the migration of moths of the African armyworm, Spodoptera exempta (Wlk.) (Lepidoptera, Noctuidae). Bull. ent. Res. 56, 671684.CrossRefGoogle Scholar
Dewhurst, C. F. (1982a) Field behaviour of moths at emergence. Paper presented at workshop on control of armyworm and other migrant pests in Eastern Africa, 59 July 1982, Arusha, Tanzania.Google Scholar
Dewhurst, C. F. (1982b) Behaviour of moths on arrival at an outbreak site. Paper presented at workshop on control of armyworm and other migrant pests in Eastern Africa, 59 July 1982, Arusha, Tanzania.Google Scholar
Dewhurst, C. F. (1984) Some observations on the mating habits of the African armyworm Spodoptera exempta (Walker) (Lepidoptera: Noctuidae). Ent. Mon. Mag. 120, 119125.Google Scholar
Dunstan, R. (1986) Armyworm control project, Tanzania. Annual Technical Report. April 1985-March 1986.Google Scholar
Faure, J. C. (1943) Phase variation in the armyworm (Laphygma exempta (Walk.)). Sci. Bull. Dept. Agric. For. Un. S. Afr. No. 234, 17 pp.Google Scholar
Fox, K. J. (1971) Migrant Lepidoptera in New Zealand 1970–1971. New Zealand Ent. 5, 5962.CrossRefGoogle Scholar
Fox, K. J. (1973) Migrant Lepidoptera in New Zealand 1972–1973. New Zealand Ent. 5, 268271.CrossRefGoogle Scholar
Gatehouse, A. G. (1986) Migration in the African armyworm, Spodoptera exempta; genetic regulation of migration and a new synthesis. In Insect flight, dispersal and migration (Edited by Danthanarayana, W.). Springer–Verlag.Google Scholar
Haggis, M. J. (1979) African armyworm Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) and wind convergence in the Kenya Rift Valley, May, 1970. E. Afr. agric. For J. 44, 332346.CrossRefGoogle Scholar
Haggis, M. J. (1982) Outbreaks in relation to topography. Paper presented at workshop on control of armyworm and other migrant pests in Eastern Africa, 59 July 1982, Arusha, Tanzania.Google Scholar
Haggis, M. J. (1984) Distribution, frequency of attack and seasonal incidence of the African armyworm Spodoptera exempta (Walk.) (Lep.: Noctuidae), with particular reference to Africa and south-western Arabia. Report of the Tropical Development and Research Institute, London L69, 116 pages.Google Scholar
Hattingh, C. C. (1941) The biology and ecology of the armyworm (Laphygma exempta) and its control in South Africa. Sci. Bull. Dep. Agric. For. Un. S. Afr. 217.Google Scholar
Khasimuddin, S. (1981) Phase variation and off-season survival of the African armyworm Spodoptera exempta (Walker) (Lepidoptera: Noctuidae). Insect Sci. Applic. 1, 357360.Google Scholar
Khasimuddin, S. and Lubega, M. C. (1979) Behavioural ecology of the African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae): evidence of successive generations from Kenya. Bull. ent. Res. 69, 275282.CrossRefGoogle Scholar
Laird, M. A. (1962) A flight of insects in the Gulf of Aden. Proc. 11th Int. Cong. Ent. 1960 3, 3536.Google Scholar
Merrett, P. (1986) Evidence of persistent populations of the African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) in East-Central Tanzania. Bull ent. Res. 76 247263.CrossRefGoogle Scholar
Nyirenda, G. K. C. (1985) Persistent populations of males of the African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) in Malawi, Bull. ent. Res. 75, 405415.CrossRefGoogle Scholar
Odiyo, P. O. (1981) Development of the first outbreaks of the African armyworm, Spodoptera exempta (Walk.) between Kenya and Tanzania during the off-season months of July–December. Insect Sci. Applic. 1, 305318.Google Scholar
Page, W. W. (1982) Low-density surveys in Kenya. Paper presented at workshop on control of armyworm and other migrant pests in Eastern Africa, 59 July, 1982, Arusha, Tanzania.Google Scholar
Page, W. W. (1985) Oocyte development in the African armyworm moth, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae). M.Sc. Thesis, University of Wales, 115 pp.Google Scholar
Parker, W. E. (1983) An experimental study on the migration of the African armyworm moth Spodoptera exempta (Walker) (Lepidoptera: Noctuidae). Ph.D. thesis. University of Wales, Bangor.Google Scholar
Parker, W. E. and Gatehouse, A. G. (1985a) The effect of larval rearing conditions on flight performance in females of the African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae). Bull. ent. Res. 75, 3547.CrossRefGoogle Scholar
Parker, W. E. and Gatehouse, A. G. (1985b) Genetic factors controlling flight performance and migration in the African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae). Bull. ent. Res. 75, 4963.CrossRefGoogle Scholar
Pedgley, D. E. (1980) Weather and airborne organisms. WMO Tech. Note No. 173.Google Scholar
Pedgley, D. E. (1982) Windborne Pests and Diseases: Meteorology of Airborne Organisms. Wiley and Sons, New York.Google Scholar
Pedgley, D. E., Reynolds, D. R., Riley, J. R. and Tucker, M. R. (1982) Flying insects reveal small-scale wind systems. Weather 37, 295306.CrossRefGoogle Scholar
Persson, B. (1981) Population fluctuations of the African armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) in out door cages in Kenya. Bull. ent. Res. 71, 269297.CrossRefGoogle Scholar
Rainey, R. C. (1979) Control of the armyworm, Spodoptera exempta in Eastern Africa and S. Arabia. FAO report.Google Scholar
Rainey, R. C. and Betts, E. (1979) Problems of alternative hypotheses. Continuity in major populations of migrant pests: the desert locust and the African armyworm. Phil. trans. R. Soc. Lond. 287, 359374.Google Scholar
Reynolds, D. R., Tucker, M. R. and Pedgley, D. E. (1981) An example of increased moth catch with onset of west winds. TDRI report.Google Scholar
Riley, J. R., Reynolds, D. R. and Farmery, M. J. (1981) Radar observations of Spodoptera exempta, Kenya, March-April 1979. COPR Misc. Report No. 54.Google Scholar
Riley, J. R., Reynolds, D. R. and Farmery, M. J. (1983) Observations of the flight behaviour of the armyworm moth, Spodoptera exempta, at an emergence site using radar and infra-red optical techniques. Ecol. Ent. 8, 395418.CrossRefGoogle Scholar
Rose, D. J. W. (1975) Field development and quality changes in successive generations of Spodoptera exempta Wlk., the African armyworm. J. appl. Ecol. 12, 727739.CrossRefGoogle Scholar
Rose, D. J. W. (1979) The significance of low density populations of the African armyworm Spodoptera exempta (Walk). Phil. Trans. R. Soc. Lond. B287, 393402.Google Scholar
Rose, D. J. W. (1984) Current views on the epidemiology of African armyworm outbreaks and strategies for control. In Working papers of the Seminar on the African armyworm. Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) 5–9 September 1984, TDRI, London, pp. 3135.Google Scholar
Rose, D. J. W. and Dewhurst, C. F. (1979) Short Communication. The African armyworm, Spodoptera exempta–congregation of moths in trees before flight. Ent. exp. et appl. 26, 346348.CrossRefGoogle Scholar
Rose, D. J. W. and Law, A. B. (1976) The synoptic weather in relation to an outbreak of the African armyworm, Spodoptera exempta (Wlk.). J. ent. Soc. Sth. Afr. 39, 125130.Google Scholar
Rose, D. J. W., Page, W. W., Dewhurst, C. F., Riley, J. R., Reynolds, D., Pedgley, D. E. and Tucker, M. R. (1985) Downwind migration of the African armyworm moth Spodoptera exempta studied by mark-and-capture and radar. Ecol. Ent. 10, 299313.CrossRefGoogle Scholar
Tucker, M. R. (1983) Light trap catches of African armyworm moths, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) in relation to rain and wind. Bull. ent. Res. 73, 315319.CrossRefGoogle Scholar
Tucker, M. R. (1984a) Forecasting the severity of armyworm seasons in East Africa from early season rainfall. Insect Sci. Applic. 5, 5155.Google Scholar
Tucker, M. R. (1984b) Possible sources of outbreaks of the armyworm, Spodoptera exempta (Walker) (Lepidoptera: Noctuidae) in East Africa at the beginning of the season. Bull. ent. Res. 74, 599607.CrossRefGoogle Scholar
Whellan, J. A. (1960) Armyworm, In: Report of the Seventh Commonwealth Ent. Conf. 6–15 July, 1960, London, 267268.Google Scholar
Yarro, J. G. (1982) The growth, development and survival of Spodoptera exempta (Walk) (Lepidoptera: Noctuidae) on some selected grass species. Ph.D. thesis, University of Dar-es-Salaam, Tanzania.Google Scholar