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Striga hermonthica parasitism is a major constraint limiting Sorghum productivity in the Nigerian savanna. Field experiments were conducted in 2005 and 2006 rainy seasons to evaluate the response of sorghum varieties to striga infestation. A randomised complete block design was used to screen 12 ...


Dugje, I.Y.Ekeleme, F.Kamara, A.Y.Menkir, A.Chikoye, D.Omoigui, L.O.[Field evaluation of sorghum varieties to Striga hermonthica infestation in north eastern Nigerian savannas]Field evaluation of sorghum varieties to Striga hermonthica infestation in north eastern Nigerian savannas

A 2-year field study was conducted to assess the effect of weed competition on the performance ofupland rice cultivars in the savannas of Nigeria. A split-plot design was used with three weeding levels asthe main plot treatments and the rice cultivars CG 14, ITA 150, WAB 56-104, NERICA1, NERICA2,...


Ekeleme, F.Kamara, A.Y.Oikeh, S.O.Omoigui, L.O.Amaza, P.Abdoulaye, TahirouChikoye, D.[Response of upland rice cultivars to weed competition in the savannas of West Africa]Response of upland rice cultivars to weed competition in the savannas of West Africa

Cowpea is an important food crop in the dry savannas of West and Central Africa because of its high protein content. Yields are, however, considerably reduced by the parasitic angiosperm Striga gesnerioides. Field trials over 2 years in two localities in northeast Nigeria evaluated the performanc...


Kamara, A.Y.Chikoye, D.Ekeleme, F.Omoigui, L.O.Dugje, I.Y.[Field performance of improved cowpea varieties under conditions of natural infestation by the parasitic weed Striga gesnerioides]Field performance of improved cowpea varieties under conditions of natural infestation by the parasitic weed Striga gesnerioides

Cowpea is an important food legume and versatile crop in the savannas of northeast Nigeria. Despite the high potential for production in this region, insect pests are a major constraint. A study was conducted to evaluate the response of diverse cowpea genotypes to different schedules of spraying ...


Kamara, Y.Chikoye, D.Omoigui, L.O.Dugje, I.Y.[Influence of insecticide spraying regimes and cultivar on insect pests and yield of cowpea in the dry savannas of northeastern Nigeria]Influence of insecticide spraying regimes and cultivar on insect pests and yield of cowpea in the dry savannas of northeastern Nigeria

In the dry savannas of West Africa, cultivation of upland rice (Oryza spp.) under rain-fed conditions is expanding due to the introduction of the New Rice for Africa (NERICA; WARDA, Bouake, Cote d'Ivoire) but appropriate N recommendations for these new cultivars are lacking. The present study eva...


Kamara, A.Y.Ekeleme, F.Omoigui, L.O.Oikeh, S.O.Chikoye, D.Tegbaru, A.[Response of upland rice cultivars to nitrogen fertilizer in the savannas of Nigeria]Response of upland rice cultivars to nitrogen fertilizer in the savannas of Nigeria

The timing of weed seedling emergence relative to the crop is important in planning and optimizing the time of weed control, but very little work has been done to predict seedling emergence of tropical weed species, especially in low-input and small-scale farms. We developed a simple model based ...


Ekeleme, F.Forcella, F.Archer, D.Akobundu, O.Chikoye, D.[Seedling emergence model for tropic Ageratum (Ageratum conyzoides)]Seedling emergence model for tropic Ageratum (Ageratum conyzoides)

Speargrass is a serious weed in many farming systems of West Africa. Participatory research and extension approaches were used to promote farmer testing of alternative speargrass management options in yam, cassava and soybean in Nigeria. Treatments were paired plots with a farmers' control and at...


Chikoye, D.Ellis-Jones, J.Avav, T.Kormawa, P.M.Udensi, U.E.Tarawali, G.Nielsen, O.K.[Promoting integrated management practices for speargrass (Imperata cylindrica (L) Raeusch.) in soybean, cassava and yam in Nigeria]Promoting integrated management practices for speargrass (Imperata cylindrica (L) Raeusch.) in soybean, cassava and yam in Nigeria

Cogongrass and guineagrass are serious perennial weeds in small-scale farms in lowland subhumid zones of West Africa. Field studies were conducted in 2002 and 2003 at two sites in Ibadan, Nigeria [Ijaye and the International Institute of Tropical Agriculture (IITA)], to evaluate the effect of rim...


Chikoye, D.Udensi, U.E.Lum, A.F.Ekeleme, F.[Rimsulfuron for postemergence weed control in corn in humid tropical environments of Nigeria]Rimsulfuron for postemergence weed control in corn in humid tropical environments of Nigeria

Cogongrass continues to be one of the most invasive weeds in the subhumid savanna. Herbicide application expenses depend on equipment costs, costs of water transport for spraying, and chemical costs. In three on-farm experiments on land heavily infested with cogongrass, the effectiveness of a kna...


Nielsen, O.K.Chikoye, D.Streibig, J.C.[Efficacy and costs of handheld sprayers in the subhumid savanna for cogongrass control]Efficacy and costs of handheld sprayers in the subhumid savanna for cogongrass control

Field trials were conducted in 1999 and 2000 in the northern Guinea savanna of Nigeria to evaluate the potential of several weed management practices to reduce early weed competition in maize. The treatments were different combinations of the herbicide mixture metolachlor + atrazine at 5 L ha−1, ...


Chikoye, D.Schulz, S.Ekeleme, F.[Evaluation of integrated weed management practices in maize in northern Nigeria]Evaluation of integrated weed management practices in maize in northern Nigeria

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