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Abundance of Aphis spiraecola Patch on Chromolaena odorata (L.) in a Palm Plantation in Benin, Nigeria.
U. O. Uyi, C. I. Aisagbonhi
Abstract
The population of Aphis spiraecola in Chromolaena odorata infested palm plantation was studied at the Nigerian Institute for Oil Palm Research, Benin, between August 2004 and January 2005. The objectives of this work were to study the population dynamics of Aphis spiraecola Patch in Nigeria and also to understand the relationship between the aphid and the weed. The study consisted of a weekly assessment of several hundred metre line transects along Chromolaena odorata infested field for the presence of Aphis spiraecola and aphid infested Chromolaena odorata plants using systematic and stratified sampling method. The monthly mean number of Aphis spiraecola recovered per square metre was 209, while the percentage of aphid infested Chromolaena odorata plants was significantly (P
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