Toxicity and spraying schedules of a biopesticide prepared from Piper guineense against two cowpea pests von Oparaeke, A.M.,Ahmadu Bello Univ., Zaria (Nigeria). Dept. of Crop Protection

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The sensitivity of flower bud thrips, Megalurothrips sjostedti Trybom (Thysanoptera: Thripidae), on cowpea to three concentrations and spraying schedules of Piper guineense Schum.... von Oparaeke, A.M.,Ahmadu Bello Univ., Zaria (Nigeria). Dept. of Crop Protection

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Field evaluation of extracts of five Nigerian spices for control of post-flowering insect pests of cowpea, Vigna unguiculata (L.) Walp von Oparaeke, Alphonsus Mbonu, Dike, Michael Chidozie, Amatobi, Christopher Iheanyi

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