Journal of Entomology1812-56701812-5689Asian Network for Scientific Information10.3923/je.2006.40.47Sitophilus zeamais (Mots.) (Coleoptera: Curculionidae) in three Maize Varieties]]>Law-OgbomoK. E.EnobakhareD. A.1200631The efficacy of rubber seed oil, palm oil and palm kernel oil as maize grain protectants against Sitophilus zeamais was tested on three maize varieties [‘Uselu’ local, SUWAN-1 and Oba Super 1 (8321-18) using a 3x5x3 factorial arrangement in a Randomized Complete Block Design. There were four replications of each of the vegetable oils using application levels of 0, 2.5, 5.0, 7.5 and 10.0 mL kg 1 maize grain. All studies were undertaken under laboratory temperature of 28±3% rh. Fifteen sexed adult insects were used for each replicate. In all the treatments, a range of significant percentage mortality of adult weevils (55-93%) at 21 days after treatment was obtained (p<0.05). Mean percentage adult weevil mortality in treated grain (70.5%) was significantly higher than in the control (0.0%). The treated grains gave adequate protection by having lower oviposition (19.8%) than the untreated control (94.5%). This was also observed to have lower adult weevil emergence (8.9%) than the untreated control (85.3%). The vegetable oils gave appreciable reduction in percentage weight loss (2.2%) when compared with the untreated control (47.3%) and had no adverse effects on grain quality. From the study, the plants could be ranked in order of effectiveness thus: rubber seed oil > palm oil> palm kernel oil. The "Uselu" local was found to be more resistant to maize weevil infestation than the improved varieties (SUWAN-1) and Oba super 1 (8321-18).]]>Abbott, W.S.,192518265267Dales, M.J.,1996Pages: 84Pages: 84Dobie, P.,19844848Don-Pedro, K.N.,1989Callosobruchus maculates (F.).]]>26107115Don-Pedro, K.N.,1990Callosobruchus maculatus (F.) on cowpea.]]>30295302Enobakhare, D.A. and K.E. Law-Ogbomo,2002Sitophilus zeamais (Motsch) in three varieties of maize treated with plant products.]]>116Hall, J.S. and G.E. Harman,199110375380Ivbijaro, M.F.,1984Sitophilus zeamais.]]>6267270Naik, R.R. and R.E. Dumbre,1984Callosobruchus maculatus Fab.]]>222531Okelana, F.A. and N.C. Osuyi,1984Sitophilus zeamais Motsch. (Coleptera: Curculionidae) in maize kernels.]]>211319Onolemhemhen, O.P.,1990Callosobruchus maculatus Fab.) in stored cowpea with rubber seed oil.]]>258793Onolemhenhem, O.P.,2001Sitophilus oryzae L.]]>22326Pereira, J.,1983Callosobruchus maculatus(F.) (Coleoptera: Bruchidae).]]>195762Su, H.C.F.,1977701821