Bioassay of Mundulea Sericea Ethanol Leaf Extract and Leaf Powder against Callosobruchus Maculatus (F.) on Stored Cowpea
Bioassay, Mundulea sericea, C maculatus and mortality
Abstract
Bioassay of ethanolic crude extract of Mundulea sericea (Willd.) A. Chev. (syn. M. suberosa Benth.) was compared with the leaf powder for their insecticidal potential against Callosobruchus maculatus on stored cowpea using actellic (25 EC) and actellic (2 %) as standard checks with an untreated control. Five pairs of day old adult C. maculatus were sexed and used to infest 100 g IAR-48 (SAMPEA 7) cowpea seeds stored for three months containing 1, 2 and 3 ml or g of the treatments with each replicated three times. All treated jars were shaken thoroughly to ensure effective coating of seeds with treatments and left on laboratory benches in the Storage Entomology Laboratory of Crop Protection Department, Institute for Agricultural Research(IAR)/Faculty of Agriculture, Ahmadu Bello University, Zaria under open conditions of 28± 2OC and 70± 10 % relative humidity. Insect mortality, oviposition, progeny emergence as well as percentage seed damage and viability were assessed.
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2012-11-10
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