Publisher: Bachudo Science Co. Ltd

Effect of Four Plant Extracts On The Infestation of Cowpea (VIGNA UNGUICULATA (L.) Walp) By Megalurothrips Sjostedti (TRYBOM) and Mylabris Pustulata (THUNBERG)

E. F. Asawalam
KEYWORDS: Plant extracts, Cowpea, Megalurothrips sjostedti, Mylabris pustulata, control

ABSTRACT:

Field studies were conducted on cowpea variety 87-9TDK, planted at 60 x 30cm spacing at the Teaching and Research farm of Crop and Sciences,. Michael Okpara University of Agriculture Umudike, in the rain forest ecological zone of Nigeria during the 2001 cropping season. The experimental design was a randomized complete block design (RCBD) with four replications. Hot water extracts from the milled leaves .of Ocimum gra.ttissimum; Vernonia amygdalina. Azadirachta indica and Chromolaena odorata controlled the cowpea field pests investigated. Two grammes per litre concentratioh of the crude plant extracts reducEid the insects infestation and significantly I(P< 0.05) increased yield. Azadirachta indica and Ocimum grattissimum were the most effective of the plant materials used.


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