H. E. Negbenebor, Nura Salisu


A research was conducted to evaluate the insecticidal effects of three plants extracts obtained from Uvaria chamae, Plumbago zeylanica and Jatropha curcas on Sitophilus zeamais which causes significant damage and economic loss to stored maize grains in Nigeria. Seeds of maize grains introduced with the test organism were treated with the three plants extracts at five different concentrations: 0.5, 1.00, 2.00, 4.00 and 8.00 mg/l with three replications per treatment and control. The control is treated with distil water. The seeds were stored under hermatic condition for a period of six months. The results obtained were analyzed using Analysis of Variance with Least significant difference used to separate the means. The result obtained revealed that, the ethanolic extracts offered comparable protection to the maize grains against the test insect for the six months duration. There was no grain damage on treated maize grains due to insect infestation for two months for U. chamae and P. zeylanica, while J. curcas gave three months protection. There was significant difference (P≤0.05) between the control and treated maize grains respectively. The mortality of the insects was used to compute mean lethal concentration (LC50) values by probit analysis and it was found that, extract from U. chamae with 48h LC50 value of 1.778 mg/l was the most toxic against S. zeamais adult followed by J. curcas and P. zeylanica with LC50 values of 1.869 and 2.353 mg/l respectively. All the concentrations tested showed appreciable toxicity against each test insect species. The computed mortality

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Abu, T., Rex-Ogbuku, E.M. and Idibiye, K. (2018). A review: secondary metabolites of Uvaria chamae p. Beauv. (Annonaceae) and their biological activities. International Journal of Agriculture, Environment and Food Science, 2(4), 177-185.

Adebowale, K.O., and Adedire, C.O. (2006). Chemical composition and insecticidal properties of the underutilized Jatropha curcas seed oil. African Journal of Biotechnology, 5 (10): 901- 906

Adeniyi, S.A., Orjiekwe, C.L., Ehiagbonare, J.E., and Arimah, B.D. (2010). Preliminary Phytochemical analysis and insecticidal activity of ethanolic extracts of four tropical plants (Vernonia amygdalina, Sida acuta, Ocimum gratissimum and Telfaria occidentalis) against beans weevil (Acanthoscelides obtectus). International Journal of Physical Sciences, 5(6):753-762.

Ahuchaogu, C.E., Ojiako, F.O. and Kabeh J. D. (2014). Evaluation of Jatropha curcas Lam. extracts in the control of some field insect pests of cowpea (Vigna unguiculata L. Walp). International Journal of Scientific and Technology Research, 3(3): 136-141.

Alabi, D.A., Oyero, L.A., Jimoh, A.N.A. (2005). Fungitoxic and phytotoxic effect of Vernonia amygdalina Del., Bryophyllum pinnantus Kurz, Ocimum gratissimum (Closium) L and Eucalypta globules (Caliptos) Labill water extracts on cowpea and cowpea seedling pathogens in Ago-Iwoye, South Western Nigeria. World Journal of Agricultural Science, 1:70-75.

Belmain, S.R., Neal, G.E. , Ray, D.E., and Golob, P. (2001). Insecticidal and vertebrate toxicity associated with ethnobotanicals used as post-harvest protectants in Ghana. Food and Chemical Toxicology, 39: 287-291.

Boateng, B.A., and Kusi, F. (2008). Toxicity of Jatropha Seed Oil to Callosobruchus maculatus (Coleoptera: Bruchidae) and its Parasitoid, Dinarmus basalis (Hymenoptera: Pteromalidae). Journal of Applied Sciences Research, 4(8): 945-951.

Bradford, K.J., Dahal, P., and Bello, P. (2016). Using relative humidity indicator paper to measure seed and commodity moisture contents. Agricultural Environmental Letter, 1:1-4.

Dabire, C., Ba, M.N. and Sanon, A. (2008). Effects of crushed fresh Cleome viscosa L. (Capparaceae) plants on the cowpea storage pest, Callosobruchus maculatus Fab. (Coleoptera: Bruchidae). International Journal of Pest Management, 54: 319-326.

Dabire, C.L.B., Kini, F.B., Ba, M.N., Dabire, R.A. and Foua-Bi, K. (2005). Effet du stade de developpement des gousses de niebe sur la biologie de la punaise suceuse Clavigralla tomentosicollis Stl. (Hemiptera: Coreidae). International Journal of Tropiical Insect Science, 25: 25-31.

Dales, M.F. (1996). A review of plant materials used for controlling insect pests of stored products. NRI Bulletin 65 Chatham, UK; Natural Resources Institute, 35-44

FAO (2013). The state of food insecurity in the world: the multiple dimensions of food security, Food and Agriculture Organization, Rome.

Gustavsson, J.. Cederberg, C., Sonesson, U., van Otterdijk, R., and Meybeck, A. (2011). Global food losses and food waste. Food and Agriculture Organization of the United Nations.

Ijeh, I.I. and Ejike, C.E.C.C. (2011). Current perspectives on the medicinal potentials of Vernonia amygdalina Del. Journal of Medicinal Plants Research, 5: 1051-1061.

Ito, E.E., and Ighere, E.J. (2017). Bio-Insecticidal Potency of Five Plant Extracts against Cowpea Weevil, Callosobruchus maculatus (F.), on Stored Cowpea, Vigna unguiculata (L). Jordan Journal of Biological Sciences, 10(4): 317-322.

Ivbijaro, M.F. (1993). Preservation of cowpea with neem seeds. Protection Ecology, 5: 177- 182.

Jadhav, K.B. and Jadhav, L.B. (1984). Use of vegetable oils .plant extracts and synthetic products as protectants from pulse beetle Callosobruchus maculatus in stored grain. Journal of Food Science and Technology, 21: 110-113

Ketoh, G.K., Koumaglo, H.K. and Glitho, I.A. (2005). Inhibition of Callosobruchus maculates (F.) (Coleoptera: Bruchidae) development with essential oil extracted from Cymbopogon schoenanthus L. Spreng. (Poaceae) and the wasp Dinarmus basalis (Rondani) (Hymenoptera: Pteromalidae). Journal of Stored Product Research, 41: 363-371.

Lazzari, F.A. and Lazzari, S.M.N. (2002). Colheita, recebimento, secagem e armazenamento de milho. Apucarana, Abimilho, 22pp.

Makanjuola, W. A. (1989). Evaluation of extracts of neem Azadirachta indica) for the control of stored product pests. Journal of Stored Product Research, 25 (4): 231-237.

Mukesh, K.S., Ajit, P., Hemant, S., Anshita, G., Bina, G., Hemant, D. and Dulal, K.T. (2017). Methanolic extract of Plumbago Zeylanica- A remarkable antibacterial agent against many human and agricultural pathogens. Journal of Pharmacopuncture, 20(1): 018-022.

Odeyemi, O.O., and Daramola, A.M. (2000). Storage practices in the tropics: food storage and pest problems. First Edition, Dave Collins Publication, Nigeria, 2: 235

Ogendo, J..O., Deng, A. L., Belmain, S. R., Walker, D.J., and Musandu, A.A. (2004). Effect of Pesticidal plant materials Lantana camara L and Tephrosia vogelii Hook, on the quality parameters of stored maize grains. The Journal of Food Technology in Africa, 9 (1): 29 -36.

Oke, O.A., and Muniru, S. (2001). Fungi associated with stored rice grains and their implications. Journal of Research and Review in Science, 2: 6-9.P

Smiderle, O. (2007). Manejo integrado de pragas de graos armazenados: identificacao e controle.


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