International Journal of Agricultural Research1816-48972152-2553Academic Journals Inc.10.3923/ijar.2007.870.876KabehJoshua Dauda 102007210The efficacy of combining harvest time modifications at early (3 WAR), optimum (4 WAR) and late (5 WAR) harvests with two pre-harvest spray of Neem seed oil (NSO), Aqueous Neem Seed Extract (ANSE) and pirimiphos-methyl (PMM) at 20 ml L-1, 50 g L-1 and 2 ml L-1 concentrations, respectively, during pod ripening and drying stages of cowpea (Var. IT 89KD-374-57) in 2004 and 2005 cropping season was evaluated in 16 m2 experimental plots in Taraba State. Bruchids infestation generally increase with delayed harvest in both seasons, while significantly less bruchid eggs and F1-adult exit holes were recorded on insecticides protected seeds. Identical bruchid species were recorded in this study as in other parts of West, East and Central Africa. The F2-adults emergence within the 4 weeks storage period were 1116 in 2004, with 22.76, 29.57 and 47.67% for early, optimum and late harvests, respectively, while 9.08, 21.68, 28.05 and 41.22% were C. chimensis, B. atrolineatus, C. rhodesianus and C. maculatus; similar value for 2005 with 1167 F2-adult emergence were, 18.56, 21.04 and 60.39% for harvest times and 78.87, 4.11, 6.50 and 10.52% for bruchid species. In both cropping seasons, larval parasitoids, D. basalis and E. vuiletti emergence maintained a 1:1 population ratio, without significant difference between species distribution.]]>Borikar, P.S. and V.M. Pawar,1998Callosobruchus chinensis (L.).]]>18271273Ricardo, B.,19851985pp: 353-360pp: 353-360Elhag, A.E.,2000Callosobruchus maculatus (Fab.). (Coleoptera: Bruchidae).]]>46109113IITA (International Institute of Tropical Agriculture),19891989Ivbijaro, M.F.,19901990Jackai, L.E.N., E.E. Inang and P. Nwobi,1992V. unguiculata (L.) Walp., using neem, A. indica A. Juss.]]>385660Kabeh, J.D. and N.E.S. Lale,2004Azadirachta indicea, A. Juss.) seed products and pirimiphos-methyl and harvest time modification on infestation of cowpeas by storage bruchids in the field and stores in Maiduguri, Nigeria.]]>21104116Lale, N.E.S. and S. Vidal,2001Callosobruchus maculatus (F.) and Callosobruchus subinnotatus (Pic.) on bambabara ground nut, Vigna subterranean (L.) Verdcourt.]]>37329338Lale, N.E.S.,20023115124Lale, N.E.S. and J.D. Kabeh,2004Azadirachta indica, A. Juss.) seed products and pirimiphos-methyl as methods of reducing field infestation of cowpeas by storage bruchids in the Nigerian Sudan Savannah.]]>6987993Longstaff, B.C.,199430179185Javed, H. and M. Afzal,2002Lysiphebus ambiguus.]]>1109111Nwokolo, E.,19961996pp: 3-11pp: 3-11Ofuya, T.I.,1999Bruchidius atrolineatus (Pic.) (Coleoptera: Bruchidae) on stored seeds of cowpea, Vigna unguiculata (L.) Walp.]]>162331Ofuya, T.I. and C. Reichmuth,2002Callosobruchus maculates (F.) (Coleoptera: Bruchidae).]]>38139146Okoronkwo, N.O.,2001Vigna unguiculata (L.) Walp.]]>2001pp: 125134Olubayo, F.M. and G.R. Port,199733271276Sanon, A., A.P. Ouedraogo, Y. Tricault, P.F. Credland and J. Huignard,1998Dinarmus basalis (Hymenoptera: Pteromalidae) adults.]]>27717725Schmutterer, H. and R.P. Singh,19951995pp: 87pp: 87Silim Nahdy, M., S.N. Silim and R.H. Ellis,1999Cajanus cajan (L.) Millsp., pods on production of active (flight) and sedentary (flightless) morphs of Callosobruchus chinensis (L.).]]>35339354