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Competition between the phycitid moths Plodia interpunctella (Hubn.) and Ephestia cautella (Wlk.) in groundnuts and on a laboratory diet

Published online by Cambridge University Press:  19 September 2011

J. Allotey  and
L. Goswami
J. Allotey
Affiliation:
Department of Biological Sciences, Rivers State University of Science and Technology, Nkpolu, Port Harcourt, Nigeria
L. Goswami
Affiliation:
Department of Biological Sciences, Rivers State University of Science and Technology, Nkpolu, Port Harcourt, Nigeria
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Abstract

Competition between Plodia interpunctella (Hubn.) and Ephestia cautella (Wlk.) was studied in groundnuts and in a limited amount of standard medium (maize meal, wheat bran and glycerol at the ratio of 8:8:1) (w/w) when the species were reared separately (conditions PI and EC), when one was added before the other (conditions P+E/2 and E+P/2) and when both were introduced together (condition PI/EC). Separately, each species was well maintained on the standard medium, while E. cautella was the better competitor in groundnuts under conditions E+P/2 and PI/EC. The results offer a possible explanation for the pest status and distribution of the two moths species in groundnuts and where their ranges overlap, especially in the tropics.

Résumé

La concurrence entre Plodia interpunctella (Hubn.) et Ephestia cautella (Wlk.) était étudiée dans les arachides et dans le moyen standard limité(maïs/blé/glycerol, 8:8:1, w/w) quand les espèces faisaient subsistées separatement (condition PI et EC), quand une était ajoutée avant l'autre (Conditions P+E/2 et E+P/2) et quand les deux étaient introduits ensemble (condition PI/EC). Separatement, les deux espèces P. interpunctella et E. cautella faisaient bien subsistées sur le moyen standard, pendant que E. cautella était la meilleur concurrent contre P. interpunctella dans les aruchides sur conditions E+P/2 et PI/EC. Les résultats offrent l'explication possible pour les rangs des insectes nuisibles et la distribution des deux teignes espèces dans les arachides et où ses portées enchevauchent particulièrement aux tropiques.

Keywords

Plodia interpunctellaEphestia cautellacompetitiongenerationpopulationPlodia interpunctellaEphestia cautellacompetitiongénérationpopulation
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 13 , Issue 5 , October 1992 , pp. 719 - 723
Copyright
Copyright © ICIPE 1992

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