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Life and fertility tables for Spodoptera exempta (Wlk.) (Lepidoptera, Noctuidae)

Published online by Cambridge University Press:  19 September 2011

Jacob G. Yarro
Jacob G. Yarro
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
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Abstract

Laboratory reared populations of Spodoptera exempta (Wlk.) had higher net reproductive rate and capacity for increase on maize, Zea mais L. and star grass, Cynodon dactylon (L.) Pers. than on Kikuyu grass, Pennisetum clandestinum Chiov., Guinea grass, Panicum maximum Jacq. and Setaria plicatilis (Hochst.) Hack. These parameters were greatly influenced by the larval mortality, but in all cases they were greater than one demonstrating that S. exempta populations can multiply on all the host plants tested. Since no populations with stable age distributions are known for S. exempta the net reproductive rate is more appropriate than the capacity for increase in estimating its population growth.

Keywords

Spodoptera exemptahost plantsnet reproductive ratecapacity for increasecohort generation timeoutbreakresident populations
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 5 , Issue 4 , August 1984 , pp. 303 - 305
Copyright
Copyright © ICIPE 1984

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