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Damage caused to maize and groundnuts by the moths Plodia interpunctella (Hubn.) and Ephestia cautella (Wlk.) and control using local plant materials

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

In a comparative situation, the moths Plodia interpunctella (Hubn.) and Ephestia cautella (Wlk.) caused more damage in groundnuts (41.85% for P. interpunctella; 29.21% for E. cautella) than in maize, when these commodities were stored for 1 month in plastic jars. For maize stored for 3 months in plastic and traditional storage gourds, the weight losses caused by the moths were: P. interpunctella—15.48% in jars; 4.53% in gourds; E. cautella—20.68% in jars; 4.12% in gourds. Orange peel suppressed two-thirds of the populations of P. interpunctella and E. cautella at a dosage of 20.0g/100g maize. Neem leaves caused 100% mortality of P. interpunctella at 15.0g/100g groundnut and suppressed more than half the population of E. cautella at 5g/100g groundnut. The results show that the plant materials utilised have some insecticidal properties against P. interpunctella and E. cautella over a short period.

Résumé

En une situation comparative, les papillons Plodia interpunctella (Hubn.) et Ephestia cautella (Wlk.) ont causé plus de dégâts aux arachides (41,58% pour P. interpunctella; 29,21% pour E. cautella) qu'au maïs quand ces produits étaient emmagasinées pendant une période d'un mois enjarres plastiques. Pour le maïs emmagasiné pendant trois mois en jarres plastiques et en gourdes d'emmagasinages traditionelles, les pertes en poids causées par les papillons étaient: P. interpunctella—15,48% en jarres; 4,53% en gourdes et E. cautella—20,68% en jarres; 4,12% en gourdes. L'écorce d'orange a réprimé deux tiers de la population de P. interpunctella et de E. cautella au dosage de 20,0g/100g maïs. Les feuilles de neem ont causé une mortalité de 100% en P. interpunctella à 15,0g/100g arachide et ont réprimé plus de la moitié de la population de E. cautella à 5g/100g arachide. Les résultats montrent que les matières de la plante utilisées ont des propriétés insecticides contre P. interpunctella et E. cautella pendant une période courte.

Keywords

Plodia interpunctellaEphestia cautelladamageorange peellemon peelneem leavesmaizegroundnutPlodia interpunctellaEphestia cautelladégâtsécorce d'orangeécorce de citronfeuilles de neemmaïsarachide
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 15 , Issue 3 , June 1994 , pp. 323 - 329
Copyright
Copyright © ICIPE 1994

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