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The status of Sorghum arundinaceum as a host of Atherigona soccata Rondani (Diptera: Muscidae) in Kenya

Published online by Cambridge University Press:  19 September 2011

Alex G. L. Delobel  and
G. C. Unnithan
Alex G. L. Delobel
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
G. C. Unnithan
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
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Abstract

Surveys were conducted in two different ecological zones (semi-arid and arid) of Kenya to monitor egg, larval and pupal populations of the sorghum shootfly, Atherigona seccata, on a wild host, Sorghum arundinaceum. Populations were found to be usually higher on wild sorghum than on local varieties of Sorghum bicolor, the cultivated host. During dry periods, shootfly eggs and larvae were still found on wild sorghum, especially in moist areas such as beds of temporary streams or river banks. Population levels seem to be related primarily with the availability of susceptible stems, which in itself is determined by rainfall, soil conditions, density of other vegetation and by the phenology and the distribution of the host plant, Sorghum arundinaceum, being a pioneer species which colonizes recently disturbed areas and is subsequently replaced by other grass species. Since no evidence of the existence of an aestivation diapause has been found, it is reasonable to assume that Sorghum arundinaceum is a major reservoir for A. seccata, especially during the dry season.

Keywords

Atherigona soccatapopulation fluctuationSorghum arundinaceumSorghum bicolorsorghum shootflySorghum verticilliflorum
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 2 , Special Issue 1-2: The Biology, Ecology and Control of the Sorghum Shootfly, Atherigona soccata Rondani , June 1981 , pp. 67 - 71
Copyright
Copyright © ICIPE 1981

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References

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