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Impact of solar radiation, rainfall and cannibalism on disappearance of maize stemborers in Kenya

Published online by Cambridge University Press:  19 September 2011

M.J. Bonhof  and
W.A. Overholt
M.J. Bonhof
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
W.A. Overholt
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
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Abstract

The effect of solar radiation, rainfall and cannibalism on the disappearance of eggs and larvae of the cereal stemborer Chilo partellus (Swinhoe) were studied. Disappearance and nonviability of egg batches was higher on plants exposed to solar radiation than on shaded plants. Significantly fewer small larvae were recovered from plants exposed to rainfall than from shielded plants. Cannibalism among larvae of the same size was not common except at high larval densities. Contrary to the common belief that disappearance is the result of predation, these studies show that solar radiation and rainfall might also play an important role in the disappearance of stemborer eggs and small larvae.

Résumé

Les effets des radiations solaires, de la pluie et du cannibalisme sur la disparition des oeufs et des larves du foreur des tiges de céréale Chilo partellus (Swinhoe) ont été étudiés. La disparition et la non-viabilité des pontes sont plus importantes sur les plantes exposées aux radiations solaires que sur celles situées à l'ombre. Le nombre de jeunes larves retrouvées sur les plantes exposées aux pluies est significativement plus faible que sur les plantes protégées. Le cannibalisme entre les larves de même taille n'est pas commun sauf si les densités de larves sont élevées. Contrairement à ce qui est communément admis, à savoir que la disparition est le résultat de la prédation, ces études montrent que les radiations solaires et la pluie peuvent aussi jouer un rôle important dans la disparition des oeufs et des jeunes larves de foreurs des tiges.

Keywords

solar radiationrainfallcannibalismdisappearanceChilo partellusmaizeradiations solairespluiecannibalismedisparitionChilo partellusmaïs
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 21 , Issue 4 , December 2001 , pp. 403 - 407
Copyright
Copyright © ICIPE 2001

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References

Berger, A. (1992) Larval movements of Chilo partellus (Lepidoptera: Pyralidae) within and between plants: Timing, density responses and survival. Bull. Entomol. Res. 82, 441–448.CrossRefGoogle Scholar
Bonhof, M.J. (2000) The impact of predators on maize stemborers in coastal Kenya. PhD thesis, Wageningen University. 181 pp.Google Scholar
Breden, F. and Chippendale, G.M. (1989) Effect of larval density and cannibalism on growth and development of the Southwestern corn borer, Diatraea grandiosella, and the European corn borer, Ostrinia nubilalis (Lepidoptera: Pyralidae). J. Kansas Entomol. Soc. 62, 307–315.Google Scholar
Girling, D.J. (1978) The distribution and biology of Eldana saccharina Walker (Lepidoptera: Pyralidae) and its relationship to other stemborers in Uganda. Bull. Entomol. Res. 68, 471–488.CrossRefGoogle Scholar
Leslie, G.W. (1988) The identification and importance of predators of Eldana saccharina (Lepidoptera: Pyralidae). Proc. 5th. Afr. Sugar Technol. Assoc. 62, 124–128.Google Scholar
Litsinger, J.A., Hasse, V., Barnon, A.T. and Schmutterer, H. (1991) Response of Ostrinia furnacalis (Guenee) (Lepidoptera: Pyralidae) to intercropping. Environ. Entomol. 20, 988–1004.CrossRefGoogle Scholar
Mathez, F.C. (1972) Chilo partellus Swinh., C. orichalcociliella Strand (Lep., Crambidae) and Sesamia calamistis Hmps. (Lep., Noctuidae) on maize in the coast province, Kenya. Mitt. Schweiz. Entomol. Gesellschaft 45, 267–289.Google Scholar
Mohyuddin, A.I. and Greathead, D.J. (1970) An annotated list of the parasites of graminaceous stemborers in East Africa, with a discussion of their potential in biological control. Entomophaga 15, 241–274.CrossRefGoogle Scholar
Nuessly, G.S. and Sterling, W.L. (1994) Mortality of Helicoverpa zea (Lepidoptera: Noctuidae) eggs in cotton as a function of oviposition sites, predator species and dessication. Environ. Entomol. 23, 1187–1202.CrossRefGoogle Scholar
Nuessly, G.S., Hartstack, A. W., Witz, J. A. and Sterling, W.L. (1991) Dislodgement of Heliothis zea (Lepidoptera: Noctuidae) eggs from cotton due to rain and wind: A predictive model. Ecol. Modelling 55, 89–102.CrossRefGoogle Scholar
Ogol, C.K.P.O., Spence, J.R. and Keddie, A. (1998) Natural enemy abundance and activity in a maize-leucaena agroforestry system in Kenya. Environ. Entomol. 27, 1444–1451.CrossRefGoogle Scholar
Oloo, G.W. (1989) The role of local natural enemies in population dynamics of Chilo partellus (Swinh.) (Pyralidae) under subsistence farming systems in Kenya. Insect Sci. Applic. 10, 243–251.Google Scholar
Overholt, W.A., Ogeda, K. and Lammers, P.M. (1994) Distribution and sampling of C. partellus (Swinhoe) (Leidoptera: Pyralidae) in maize and sorghum at the Kenyan Coast. Bull. Entomol. Res. 84, 367–378.CrossRefGoogle Scholar
Takasu, K. and Overholt, W.A. (1997) Aggressive behaviour of Chilo partellus (Swinhoe) larvae against the parasitoid, Cotesia flavipes Cameron. Insect Sci. Applic. 17, 131–135.Google Scholar
van den Berg, H. and Cock, M.J.W. (1993) Stage-specific mortality of Helicoverpa armigera in three smallholder crops in Kenya. Appl. Ecol. 30, 640–653.CrossRefGoogle Scholar
van Huis, A. (1981) Integrated pest management in the small farmer's maize crop in Nicaragua. PhD thesis, Wageningen Agricultural University. 222 pp.Google Scholar